| 1 | //! Fortran I/O subsystem — unit management, list-directed and formatted I/O. |
| 2 | //! |
| 3 | //! The I/O state is global (Fortran I/O units are program-wide). Access |
| 4 | //! is protected by a mutex for future thread safety (DO CONCURRENT). |
| 5 | //! |
| 6 | //! Preconnected units: |
| 7 | //! - Unit 5 → stdin |
| 8 | //! - Unit 6 → stdout |
| 9 | //! - Unit 0 → stderr |
| 10 | //! - * in I/O statements → unit 5 (read) or 6 (write) |
| 11 | |
| 12 | use std::collections::HashMap; |
| 13 | use std::fs::{File, OpenOptions}; |
| 14 | use std::io::{self, BufRead, BufReader, BufWriter, Read, Seek, SeekFrom, Write}; |
| 15 | use std::sync::Mutex; |
| 16 | |
| 17 | // ---- Global I/O state ---- |
| 18 | |
| 19 | use std::sync::OnceLock; |
| 20 | |
| 21 | fn io_state() -> &'static Mutex<IoState> { |
| 22 | static STATE: OnceLock<Mutex<IoState>> = OnceLock::new(); |
| 23 | STATE.get_or_init(|| Mutex::new(IoState::new())) |
| 24 | } |
| 25 | |
| 26 | fn scratch_filename(unit: i32) -> String { |
| 27 | use std::sync::atomic::{AtomicU64, Ordering}; |
| 28 | static SEQ: AtomicU64 = AtomicU64::new(0); |
| 29 | let seq = SEQ.fetch_add(1, Ordering::Relaxed); |
| 30 | let pid = std::process::id(); |
| 31 | let dir = std::env::temp_dir(); |
| 32 | dir.join(format!( |
| 33 | "afs_scratch_{pid}_{}_{seq}.tmp", |
| 34 | unit.unsigned_abs() |
| 35 | )) |
| 36 | .to_string_lossy() |
| 37 | .into_owned() |
| 38 | } |
| 39 | |
| 40 | #[inline] |
| 41 | fn read_i128_ptr(src: *const i128) -> Option<i128> { |
| 42 | if src.is_null() { |
| 43 | None |
| 44 | } else { |
| 45 | Some(unsafe { std::ptr::read_unaligned(src) }) |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | #[inline] |
| 50 | fn write_i128_ptr(dst: *mut i128, value: i128) { |
| 51 | if !dst.is_null() { |
| 52 | unsafe { std::ptr::write_unaligned(dst, value) }; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | // ---- Unit status types ---- |
| 57 | |
| 58 | #[derive(Debug, Clone, PartialEq)] |
| 59 | enum UnitStatus { |
| 60 | Open, |
| 61 | } |
| 62 | |
| 63 | #[derive(Debug, Clone, Copy, PartialEq)] |
| 64 | enum Access { |
| 65 | Sequential, |
| 66 | Direct, |
| 67 | Stream, |
| 68 | } |
| 69 | |
| 70 | #[derive(Debug, Clone, PartialEq)] |
| 71 | enum Form { |
| 72 | Formatted, |
| 73 | Unformatted, |
| 74 | } |
| 75 | |
| 76 | #[derive(Debug, Clone, Copy, PartialEq)] |
| 77 | enum Action { |
| 78 | Read, |
| 79 | Write, |
| 80 | ReadWrite, |
| 81 | } |
| 82 | |
| 83 | // ---- Unit ---- |
| 84 | |
| 85 | enum UnitStream { |
| 86 | Stdin, |
| 87 | Stdout, |
| 88 | Stderr, |
| 89 | FileRead(BufReader<File>), |
| 90 | FileWrite(BufWriter<File>), |
| 91 | /// Raw file handle for direct/stream access (supports both read and write + seeking). |
| 92 | FileRaw(File), |
| 93 | } |
| 94 | |
| 95 | struct Unit { |
| 96 | _number: i32, |
| 97 | stream: UnitStream, |
| 98 | filename: String, |
| 99 | _status: UnitStatus, |
| 100 | access: Access, |
| 101 | form: Form, |
| 102 | action: Action, |
| 103 | /// Record length for direct access (in bytes). None for sequential/stream. |
| 104 | recl: Option<i64>, |
| 105 | /// Buffered tokens from the current input record for list-directed READ. |
| 106 | read_tokens: Vec<String>, |
| 107 | /// Cached formatted input record for the current READ statement. |
| 108 | formatted_read_record: Option<String>, |
| 109 | /// Cursor within a cached formatted input record for ADVANCE='NO' reads. |
| 110 | formatted_read_cursor: usize, |
| 111 | /// True for STATUS='SCRATCH' units: backing file is deleted on close or exit. |
| 112 | scratch: bool, |
| 113 | /// In-flight sequential-unformatted record buffer. Set by |
| 114 | /// `afs_list_write_begin` and drained by `afs_list_write_end`. |
| 115 | /// While Some, list-directed write helpers append raw bytes here |
| 116 | /// instead of writing ASCII or directly to the file stream — the |
| 117 | /// whole statement materializes as one record [len][data][len]. |
| 118 | pending_record: Option<Vec<u8>>, |
| 119 | /// In-flight sequential-unformatted record being consumed by a |
| 120 | /// list-directed READ statement. Set by `afs_list_read_begin` |
| 121 | /// (which reads a full [len][data][len] record into memory) and |
| 122 | /// cleared by `afs_list_read_end`. The cursor tracks how many |
| 123 | /// bytes the per-item helpers have consumed so far. |
| 124 | pending_read: Option<(Vec<u8>, usize)>, |
| 125 | } |
| 126 | |
| 127 | impl Unit { |
| 128 | fn is_unformatted(&self) -> bool { |
| 129 | self.form == Form::Unformatted |
| 130 | } |
| 131 | |
| 132 | /// Append raw bytes to the in-flight unformatted record buffer if |
| 133 | /// one is open, otherwise write directly to the stream. Returns |
| 134 | /// `true` when bytes were buffered. |
| 135 | fn raw_or_buffer(&mut self, bytes: &[u8]) -> bool { |
| 136 | if let Some(buf) = self.pending_record.as_mut() { |
| 137 | buf.extend_from_slice(bytes); |
| 138 | true |
| 139 | } else { |
| 140 | let _ = self.write_raw(bytes); |
| 141 | false |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /// Consume `n` bytes from the in-flight unformatted read record |
| 146 | /// (advancing the cursor). Returns `Some(slice)` when the record |
| 147 | /// has enough bytes; `None` when the record is exhausted, when no |
| 148 | /// pending record is open, or when fewer than `n` bytes remain. |
| 149 | fn read_buffer_take(&mut self, n: usize) -> Option<Vec<u8>> { |
| 150 | let (buf, cur) = self.pending_read.as_mut()?; |
| 151 | if *cur + n > buf.len() { |
| 152 | return None; |
| 153 | } |
| 154 | let out = buf[*cur..*cur + n].to_vec(); |
| 155 | *cur += n; |
| 156 | Some(out) |
| 157 | } |
| 158 | |
| 159 | fn write_bytes(&mut self, data: &[u8]) -> io::Result<()> { |
| 160 | match &mut self.stream { |
| 161 | UnitStream::Stdout => { |
| 162 | io::stdout().write_all(data)?; |
| 163 | } |
| 164 | UnitStream::Stderr => { |
| 165 | io::stderr().write_all(data)?; |
| 166 | } |
| 167 | UnitStream::FileWrite(w) => { |
| 168 | w.write_all(data)?; |
| 169 | } |
| 170 | UnitStream::FileRaw(f) => { |
| 171 | f.write_all(data)?; |
| 172 | } |
| 173 | _ => { |
| 174 | return Err(io::Error::new( |
| 175 | io::ErrorKind::PermissionDenied, |
| 176 | "unit not open for writing", |
| 177 | )) |
| 178 | } |
| 179 | } |
| 180 | Ok(()) |
| 181 | } |
| 182 | |
| 183 | fn write_str(&mut self, s: &str) -> io::Result<()> { |
| 184 | self.write_bytes(s.as_bytes()) |
| 185 | } |
| 186 | |
| 187 | fn read_line(&mut self) -> io::Result<String> { |
| 188 | let mut line = String::new(); |
| 189 | match &mut self.stream { |
| 190 | UnitStream::Stdin => { |
| 191 | io::stdin().lock().read_line(&mut line)?; |
| 192 | } |
| 193 | UnitStream::FileRead(r) => { |
| 194 | r.read_line(&mut line)?; |
| 195 | } |
| 196 | UnitStream::FileRaw(f) => { |
| 197 | let mut byte = [0u8; 1]; |
| 198 | loop { |
| 199 | match f.read(&mut byte)? { |
| 200 | 0 => break, |
| 201 | 1 => { |
| 202 | line.push(byte[0] as char); |
| 203 | if byte[0] == b'\n' { |
| 204 | break; |
| 205 | } |
| 206 | } |
| 207 | _ => unreachable!(), |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | _ => { |
| 212 | return Err(io::Error::new( |
| 213 | io::ErrorKind::PermissionDenied, |
| 214 | "unit not open for reading", |
| 215 | )) |
| 216 | } |
| 217 | } |
| 218 | Ok(line) |
| 219 | } |
| 220 | |
| 221 | /// Get the next token for list-directed READ. |
| 222 | /// Reads a new line if the token buffer is empty. |
| 223 | fn next_read_token(&mut self) -> io::Result<Option<String>> { |
| 224 | // Consume from buffer first. |
| 225 | if !self.read_tokens.is_empty() { |
| 226 | return Ok(Some(self.read_tokens.remove(0))); |
| 227 | } |
| 228 | // Read a new line and tokenize. |
| 229 | let line = self.read_line()?; |
| 230 | let trimmed = line.trim().to_string(); |
| 231 | if trimmed.is_empty() { |
| 232 | return Ok(None); // EOF or blank line |
| 233 | } |
| 234 | // Split on whitespace and commas. |
| 235 | let tokens: Vec<String> = trimmed |
| 236 | .split(|c: char| c.is_whitespace() || c == ',') |
| 237 | .filter(|s| !s.is_empty()) |
| 238 | .map(String::from) |
| 239 | .collect(); |
| 240 | if tokens.is_empty() { |
| 241 | return Ok(None); |
| 242 | } |
| 243 | self.read_tokens = tokens; |
| 244 | Ok(Some(self.read_tokens.remove(0))) |
| 245 | } |
| 246 | |
| 247 | fn flush(&mut self) -> io::Result<()> { |
| 248 | match &mut self.stream { |
| 249 | UnitStream::Stdout => io::stdout().flush(), |
| 250 | UnitStream::Stderr => io::stderr().flush(), |
| 251 | UnitStream::FileWrite(w) => w.flush(), |
| 252 | UnitStream::FileRaw(f) => f.flush(), |
| 253 | _ => Ok(()), |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | // ---- I/O State ---- |
| 259 | |
| 260 | struct IoState { |
| 261 | units: HashMap<i32, Unit>, |
| 262 | next_newunit: i32, |
| 263 | } |
| 264 | |
| 265 | impl IoState { |
| 266 | fn new() -> Self { |
| 267 | let mut units = HashMap::new(); |
| 268 | |
| 269 | // Preconnected units. |
| 270 | units.insert( |
| 271 | 5, |
| 272 | Unit { |
| 273 | _number: 5, |
| 274 | stream: UnitStream::Stdin, |
| 275 | filename: "stdin".into(), |
| 276 | _status: UnitStatus::Open, |
| 277 | access: Access::Sequential, |
| 278 | form: Form::Formatted, |
| 279 | action: Action::Read, |
| 280 | recl: None, |
| 281 | read_tokens: Vec::new(), |
| 282 | formatted_read_record: None, |
| 283 | formatted_read_cursor: 0, |
| 284 | scratch: false, |
| 285 | pending_record: None, |
| 286 | pending_read: None, |
| 287 | }, |
| 288 | ); |
| 289 | units.insert( |
| 290 | 6, |
| 291 | Unit { |
| 292 | _number: 6, |
| 293 | stream: UnitStream::Stdout, |
| 294 | filename: "stdout".into(), |
| 295 | _status: UnitStatus::Open, |
| 296 | access: Access::Sequential, |
| 297 | form: Form::Formatted, |
| 298 | action: Action::Write, |
| 299 | recl: None, |
| 300 | read_tokens: Vec::new(), |
| 301 | formatted_read_record: None, |
| 302 | formatted_read_cursor: 0, |
| 303 | scratch: false, |
| 304 | pending_record: None, |
| 305 | pending_read: None, |
| 306 | }, |
| 307 | ); |
| 308 | units.insert( |
| 309 | 0, |
| 310 | Unit { |
| 311 | _number: 0, |
| 312 | stream: UnitStream::Stderr, |
| 313 | filename: "stderr".into(), |
| 314 | _status: UnitStatus::Open, |
| 315 | access: Access::Sequential, |
| 316 | form: Form::Formatted, |
| 317 | action: Action::Write, |
| 318 | recl: None, |
| 319 | read_tokens: Vec::new(), |
| 320 | formatted_read_record: None, |
| 321 | formatted_read_cursor: 0, |
| 322 | scratch: false, |
| 323 | pending_record: None, |
| 324 | pending_read: None, |
| 325 | }, |
| 326 | ); |
| 327 | |
| 328 | Self { |
| 329 | units, |
| 330 | next_newunit: -10, |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | fn get_unit(&mut self, unit_num: i32) -> Option<&mut Unit> { |
| 335 | self.units.get_mut(&unit_num) |
| 336 | } |
| 337 | |
| 338 | fn alloc_newunit(&mut self) -> i32 { |
| 339 | let u = self.next_newunit; |
| 340 | self.next_newunit -= 1; |
| 341 | u |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | // ---- Public C API: OPEN/CLOSE ---- |
| 346 | |
| 347 | /// Open a file and associate it with a unit number. |
| 348 | /// OPEN control block — packed struct for passing all OPEN specifiers in one pointer. |
| 349 | #[repr(C)] |
| 350 | pub struct OpenControlBlock { |
| 351 | pub unit: i32, |
| 352 | pub filename: *const u8, |
| 353 | pub filename_len: i64, |
| 354 | pub status: *const u8, |
| 355 | pub status_len: i64, |
| 356 | pub action: *const u8, |
| 357 | pub action_len: i64, |
| 358 | pub access: *const u8, |
| 359 | pub access_len: i64, |
| 360 | pub form: *const u8, |
| 361 | pub form_len: i64, |
| 362 | pub recl: i64, |
| 363 | pub iostat: *mut i32, |
| 364 | pub newunit: *mut i32, |
| 365 | pub position: *const u8, |
| 366 | pub position_len: i64, |
| 367 | } |
| 368 | |
| 369 | /// Simple OPEN with the most common specifiers (fits in 8 registers). |
| 370 | /// Used by the IR lowering for basic OPEN statements. |
| 371 | #[no_mangle] |
| 372 | pub extern "C" fn afs_open_simple( |
| 373 | unit: i32, |
| 374 | filename: *const u8, |
| 375 | filename_len: i64, |
| 376 | status: *const u8, |
| 377 | status_len: i64, |
| 378 | action: *const u8, |
| 379 | action_len: i64, |
| 380 | ) { |
| 381 | let cb = OpenControlBlock { |
| 382 | unit, |
| 383 | filename, |
| 384 | filename_len, |
| 385 | status, |
| 386 | status_len, |
| 387 | action, |
| 388 | action_len, |
| 389 | access: std::ptr::null(), |
| 390 | access_len: 0, |
| 391 | form: std::ptr::null(), |
| 392 | form_len: 0, |
| 393 | recl: 0, |
| 394 | iostat: std::ptr::null_mut(), |
| 395 | newunit: std::ptr::null_mut(), |
| 396 | position: std::ptr::null(), |
| 397 | position_len: 0, |
| 398 | }; |
| 399 | afs_open(&cb); |
| 400 | } |
| 401 | |
| 402 | /// Open a file unit. Takes a pointer to an OpenControlBlock to avoid |
| 403 | /// exceeding the 8-register ARM64 calling convention limit. |
| 404 | #[no_mangle] |
| 405 | pub extern "C" fn afs_open(cb: *const OpenControlBlock) { |
| 406 | if cb.is_null() { |
| 407 | return; |
| 408 | } |
| 409 | let cb = unsafe { &*cb }; |
| 410 | let unit = cb.unit; |
| 411 | let fname = unsafe_str(cb.filename, cb.filename_len); |
| 412 | let status_str = unsafe_str(cb.status, cb.status_len).to_lowercase(); |
| 413 | let is_scratch = status_str.trim() == "scratch"; |
| 414 | let action_str = unsafe_str(cb.action, cb.action_len).to_lowercase(); |
| 415 | let access_str = unsafe_str(cb.access, cb.access_len).to_lowercase(); |
| 416 | let form_str = unsafe_str(cb.form, cb.form_len).to_lowercase(); |
| 417 | let position_str = unsafe_str(cb.position, cb.position_len).to_lowercase(); |
| 418 | let recl = cb.recl; |
| 419 | let iostat = cb.iostat; |
| 420 | let newunit = cb.newunit; |
| 421 | let missing_filename = fname.trim().is_empty(); |
| 422 | |
| 423 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 424 | |
| 425 | // NEWUNIT: allocate a new unit number. |
| 426 | let actual_unit = if !newunit.is_null() { |
| 427 | let u = state.alloc_newunit(); |
| 428 | unsafe { |
| 429 | *newunit = u; |
| 430 | } |
| 431 | u |
| 432 | } else { |
| 433 | unit |
| 434 | }; |
| 435 | |
| 436 | let existing_unit = state.units.get(&actual_unit).map(|u| { |
| 437 | ( |
| 438 | u.filename.clone(), |
| 439 | u.access, |
| 440 | u.form.clone(), |
| 441 | u.action, |
| 442 | u.recl, |
| 443 | ) |
| 444 | }); |
| 445 | let fname = if missing_filename { |
| 446 | if is_scratch { |
| 447 | // STATUS='SCRATCH': F2018 §12.5.6.13 — implementation chooses the |
| 448 | // backing path; file must not be FILE=, must be deleted on close. |
| 449 | scratch_filename(actual_unit) |
| 450 | } else { |
| 451 | existing_unit |
| 452 | .as_ref() |
| 453 | .map(|(filename, _, _, _, _)| filename.clone()) |
| 454 | .unwrap_or(fname) |
| 455 | } |
| 456 | } else { |
| 457 | fname |
| 458 | }; |
| 459 | |
| 460 | let update_existing_in_place = missing_filename |
| 461 | && existing_unit.is_some() |
| 462 | && status_str.trim().is_empty() |
| 463 | && action_str.trim().is_empty() |
| 464 | && access_str.trim().is_empty() |
| 465 | && form_str.trim().is_empty() |
| 466 | && recl <= 0 |
| 467 | && newunit.is_null(); |
| 468 | if update_existing_in_place { |
| 469 | if let Some(unit) = state.get_unit(actual_unit) { |
| 470 | match position_str.trim() { |
| 471 | "append" => match &mut unit.stream { |
| 472 | UnitStream::FileRaw(f) => { |
| 473 | let _ = f.seek(SeekFrom::End(0)); |
| 474 | } |
| 475 | UnitStream::FileRead(r) => { |
| 476 | let _ = r.seek(SeekFrom::End(0)); |
| 477 | } |
| 478 | UnitStream::FileWrite(w) => { |
| 479 | let _ = w.seek(SeekFrom::End(0)); |
| 480 | } |
| 481 | _ => {} |
| 482 | }, |
| 483 | "rewind" => match &mut unit.stream { |
| 484 | UnitStream::FileRaw(f) => { |
| 485 | let _ = f.seek(SeekFrom::Start(0)); |
| 486 | } |
| 487 | UnitStream::FileRead(r) => { |
| 488 | let _ = r.seek(SeekFrom::Start(0)); |
| 489 | } |
| 490 | UnitStream::FileWrite(w) => { |
| 491 | let _ = w.seek(SeekFrom::Start(0)); |
| 492 | } |
| 493 | _ => {} |
| 494 | }, |
| 495 | _ => {} |
| 496 | } |
| 497 | } |
| 498 | if !iostat.is_null() { |
| 499 | unsafe { |
| 500 | *iostat = 0; |
| 501 | } |
| 502 | } |
| 503 | return; |
| 504 | } |
| 505 | |
| 506 | // Build OpenOptions based on status/action. |
| 507 | let mut opts = OpenOptions::new(); |
| 508 | match status_str.trim() { |
| 509 | "old" => { |
| 510 | opts.read(true); |
| 511 | } |
| 512 | "new" => { |
| 513 | opts.write(true).create_new(true); |
| 514 | } |
| 515 | "replace" => { |
| 516 | opts.write(true).create(true).truncate(true); |
| 517 | } |
| 518 | "scratch" | "unknown" | "" => { |
| 519 | opts.read(true).write(true).create(true); |
| 520 | } |
| 521 | _ => { |
| 522 | opts.read(true).write(true).create(true); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | // Determine action. Default depends on status: |
| 527 | // old → read, new/replace → write, scratch/unknown → readwrite. |
| 528 | let effective_action = match action_str.trim() { |
| 529 | "read" => "read", |
| 530 | "write" => "write", |
| 531 | "readwrite" => "readwrite", |
| 532 | "" => existing_unit |
| 533 | .as_ref() |
| 534 | .map(|(_, _, _, action, _)| match action { |
| 535 | Action::Read => "read", |
| 536 | Action::Write => "write", |
| 537 | Action::ReadWrite => "readwrite", |
| 538 | }) |
| 539 | .unwrap_or_else(|| match status_str.trim() { |
| 540 | "old" => "read", |
| 541 | "new" | "replace" => "write", |
| 542 | _ => "readwrite", |
| 543 | }), |
| 544 | _ => "readwrite", |
| 545 | }; |
| 546 | |
| 547 | match effective_action { |
| 548 | "read" => { |
| 549 | opts.read(true); |
| 550 | } |
| 551 | "write" => { |
| 552 | opts.write(true).create(true); |
| 553 | } |
| 554 | _ => { |
| 555 | opts.read(true).write(true).create(true); |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | // Flush and close existing unit if re-opening. |
| 560 | if let Some(mut existing) = state.units.remove(&actual_unit) { |
| 561 | let _ = existing.flush(); |
| 562 | // Drop closes the file handle. |
| 563 | } |
| 564 | |
| 565 | match opts.open(&fname) { |
| 566 | Ok(file) => { |
| 567 | let file_action = match effective_action { |
| 568 | "read" => Action::Read, |
| 569 | "write" => Action::Write, |
| 570 | _ => Action::ReadWrite, |
| 571 | }; |
| 572 | let file_access = match access_str.trim() { |
| 573 | "direct" => Access::Direct, |
| 574 | "stream" => Access::Stream, |
| 575 | "" => existing_unit |
| 576 | .as_ref() |
| 577 | .map(|(_, access, _, _, _)| *access) |
| 578 | .unwrap_or(Access::Sequential), |
| 579 | _ => Access::Sequential, |
| 580 | }; |
| 581 | let file_form = match form_str.trim() { |
| 582 | "unformatted" => Form::Unformatted, |
| 583 | "" => existing_unit |
| 584 | .as_ref() |
| 585 | .map(|(_, _, form, _, _)| form.clone()) |
| 586 | .unwrap_or(Form::Formatted), |
| 587 | _ => Form::Formatted, |
| 588 | }; |
| 589 | |
| 590 | // Direct, stream, and readwrite access use raw file handle for seeking. |
| 591 | // ReadWrite needs FileRaw because BufWriter can't read and BufReader can't write. |
| 592 | let stream = match file_access { |
| 593 | Access::Direct | Access::Stream => UnitStream::FileRaw(file), |
| 594 | Access::Sequential => match file_action { |
| 595 | Action::Read => UnitStream::FileRead(BufReader::new(file)), |
| 596 | Action::Write => UnitStream::FileWrite(BufWriter::new(file)), |
| 597 | Action::ReadWrite => UnitStream::FileRaw(file), |
| 598 | }, |
| 599 | }; |
| 600 | state.units.insert( |
| 601 | actual_unit, |
| 602 | Unit { |
| 603 | _number: actual_unit, |
| 604 | stream, |
| 605 | filename: fname, |
| 606 | _status: UnitStatus::Open, |
| 607 | access: file_access, |
| 608 | form: file_form, |
| 609 | action: file_action, |
| 610 | recl: if recl > 0 { |
| 611 | Some(recl) |
| 612 | } else { |
| 613 | existing_unit |
| 614 | .as_ref() |
| 615 | .and_then(|(_, _, _, _, existing_recl)| *existing_recl) |
| 616 | }, |
| 617 | read_tokens: Vec::new(), |
| 618 | formatted_read_record: None, |
| 619 | formatted_read_cursor: 0, |
| 620 | scratch: is_scratch, |
| 621 | pending_record: None, |
| 622 | pending_read: None, |
| 623 | }, |
| 624 | ); |
| 625 | |
| 626 | // Apply POSITION specifier. |
| 627 | // Default: REWIND for sequential, ASIS for direct/stream. |
| 628 | let pos = match position_str.trim() { |
| 629 | "append" => Some(SeekFrom::End(0)), |
| 630 | "rewind" => Some(SeekFrom::Start(0)), |
| 631 | "asis" => None, |
| 632 | "" => match file_access { |
| 633 | Access::Sequential => Some(SeekFrom::Start(0)), |
| 634 | _ => None, |
| 635 | }, |
| 636 | _ => None, |
| 637 | }; |
| 638 | if let Some(seek) = pos { |
| 639 | if let Some(u) = state.get_unit(actual_unit) { |
| 640 | match &mut u.stream { |
| 641 | UnitStream::FileRaw(f) => { |
| 642 | let _ = f.seek(seek); |
| 643 | } |
| 644 | UnitStream::FileRead(r) => { |
| 645 | let _ = r.seek(seek); |
| 646 | } |
| 647 | UnitStream::FileWrite(w) => { |
| 648 | let _ = w.seek(seek); |
| 649 | } |
| 650 | _ => {} |
| 651 | } |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | if !iostat.is_null() { |
| 656 | unsafe { |
| 657 | *iostat = 0; |
| 658 | } |
| 659 | } |
| 660 | } |
| 661 | Err(e) => { |
| 662 | if !iostat.is_null() { |
| 663 | unsafe { |
| 664 | *iostat = e.raw_os_error().unwrap_or(1); |
| 665 | } |
| 666 | } else { |
| 667 | // Release the io_state mutex before exit. process::exit invokes |
| 668 | // libc atexit handlers — including afs_io_finalize, which locks |
| 669 | // io_state to flush units. Holding the lock here while exiting |
| 670 | // deadlocked on macOS where the atexit thread re-entered the |
| 671 | // same mutex (sample-trace: pthread_mutex_firstfit_lock_wait |
| 672 | // → __psynch_mutexwait, hangs forever). |
| 673 | drop(state); |
| 674 | eprintln!("OPEN: {}: {}", fname, e); |
| 675 | std::process::exit(1); |
| 676 | } |
| 677 | } |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | /// Close a unit. |
| 682 | #[no_mangle] |
| 683 | pub extern "C" fn afs_close(unit: i32, iostat: *mut i32) { |
| 684 | afs_close_ex(unit, std::ptr::null(), 0, iostat); |
| 685 | } |
| 686 | |
| 687 | /// Close a unit with optional STATUS= semantics. |
| 688 | #[no_mangle] |
| 689 | pub extern "C" fn afs_close_ex(unit: i32, status: *const u8, status_len: i64, iostat: *mut i32) { |
| 690 | let delete_on_close = if status.is_null() || status_len <= 0 { |
| 691 | false |
| 692 | } else { |
| 693 | let raw = unsafe { std::slice::from_raw_parts(status, status_len as usize) }; |
| 694 | std::str::from_utf8(raw) |
| 695 | .map(|s| s.trim().eq_ignore_ascii_case("delete")) |
| 696 | .unwrap_or(false) |
| 697 | }; |
| 698 | |
| 699 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 700 | if let Some(mut u) = state.units.remove(&unit) { |
| 701 | let _ = u.flush(); |
| 702 | let filename = u.filename.clone(); |
| 703 | // STATUS='SCRATCH' units always delete on close (F2018 §12.5.6.13). |
| 704 | let delete = delete_on_close || u.scratch; |
| 705 | drop(u); |
| 706 | |
| 707 | let mut close_status = 0; |
| 708 | if delete |
| 709 | && !matches!(filename.as_str(), "stdin" | "stdout" | "stderr") |
| 710 | && !filename.is_empty() |
| 711 | { |
| 712 | if let Err(e) = std::fs::remove_file(&filename) { |
| 713 | close_status = e.raw_os_error().unwrap_or(1); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | if !iostat.is_null() { |
| 718 | unsafe { *iostat = close_status }; |
| 719 | } else if close_status != 0 { |
| 720 | // Release lock before exit (afs_io_finalize atexit re-locks). See afs_open. |
| 721 | drop(state); |
| 722 | eprintln!( |
| 723 | "CLOSE: {}: {}", |
| 724 | filename, |
| 725 | io::Error::from_raw_os_error(close_status) |
| 726 | ); |
| 727 | std::process::exit(1); |
| 728 | } |
| 729 | } else { |
| 730 | if !iostat.is_null() { |
| 731 | unsafe { |
| 732 | *iostat = 0; |
| 733 | } |
| 734 | } // closing unopen unit is not an error |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | // ---- Public C API: List-directed WRITE ---- |
| 739 | |
| 740 | /// Write an integer value (list-directed). |
| 741 | #[no_mangle] |
| 742 | pub extern "C" fn afs_write_int(unit: i32, val: i32) { |
| 743 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 744 | if let Some(u) = state.get_unit(unit) { |
| 745 | if u.is_unformatted() { |
| 746 | u.raw_or_buffer(&val.to_ne_bytes()); |
| 747 | } else { |
| 748 | let _ = u.write_str(&format!(" {}", val)); |
| 749 | } |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | /// Write a 64-bit integer value (list-directed). |
| 754 | #[no_mangle] |
| 755 | pub extern "C" fn afs_write_int64(unit: i32, val: i64) { |
| 756 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 757 | if let Some(u) = state.get_unit(unit) { |
| 758 | if u.is_unformatted() { |
| 759 | u.raw_or_buffer(&val.to_ne_bytes()); |
| 760 | } else { |
| 761 | let _ = u.write_str(&format!(" {}", val)); |
| 762 | } |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | /// Write a 128-bit integer value (list-directed). |
| 767 | #[no_mangle] |
| 768 | pub extern "C" fn afs_write_int128(unit: i32, val: i128) { |
| 769 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 770 | if let Some(u) = state.get_unit(unit) { |
| 771 | if u.is_unformatted() { |
| 772 | u.raw_or_buffer(&val.to_ne_bytes()); |
| 773 | } else { |
| 774 | let _ = u.write_str(&format!(" {}", val)); |
| 775 | } |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | /// Write a real value (list-directed). |
| 780 | #[no_mangle] |
| 781 | pub extern "C" fn afs_write_real(unit: i32, val: f32) { |
| 782 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 783 | if let Some(u) = state.get_unit(unit) { |
| 784 | if u.is_unformatted() { |
| 785 | u.raw_or_buffer(&val.to_ne_bytes()); |
| 786 | } else { |
| 787 | let _ = u.write_str(&format!(" {:14.7E}", val)); |
| 788 | } |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | /// Write a double value (list-directed). |
| 793 | #[no_mangle] |
| 794 | pub extern "C" fn afs_write_real64(unit: i32, val: f64) { |
| 795 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 796 | if let Some(u) = state.get_unit(unit) { |
| 797 | if u.is_unformatted() { |
| 798 | u.raw_or_buffer(&val.to_ne_bytes()); |
| 799 | } else { |
| 800 | let _ = u.write_str(&format!(" {:22.15E}", val)); |
| 801 | } |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | /// Write a complex(4) value (list-directed): " (re,im)". |
| 806 | /// `ptr` points to a two-element f32 array [real, imag]. |
| 807 | #[no_mangle] |
| 808 | pub extern "C" fn afs_write_complex_f32(unit: i32, ptr: *const f32) { |
| 809 | let (re, im) = unsafe { (*ptr, *ptr.add(1)) }; |
| 810 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 811 | if let Some(u) = state.get_unit(unit) { |
| 812 | if u.is_unformatted() { |
| 813 | u.raw_or_buffer(&re.to_ne_bytes()); |
| 814 | u.raw_or_buffer(&im.to_ne_bytes()); |
| 815 | } else { |
| 816 | let _ = u.write_str(&format!(" ({:14.7E},{:14.7E})", re, im)); |
| 817 | } |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | /// Write a complex(8) value (list-directed): " (re,im)". |
| 822 | /// `ptr` points to a two-element f64 array [real, imag]. |
| 823 | #[no_mangle] |
| 824 | pub extern "C" fn afs_write_complex_f64(unit: i32, ptr: *const f64) { |
| 825 | let (re, im) = unsafe { (*ptr, *ptr.add(1)) }; |
| 826 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 827 | if let Some(u) = state.get_unit(unit) { |
| 828 | if u.is_unformatted() { |
| 829 | u.raw_or_buffer(&re.to_ne_bytes()); |
| 830 | u.raw_or_buffer(&im.to_ne_bytes()); |
| 831 | } else { |
| 832 | let _ = u.write_str(&format!(" ({:22.15E},{:22.15E})", re, im)); |
| 833 | } |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | /// Write a character string (list-directed). |
| 838 | #[no_mangle] |
| 839 | pub extern "C" fn afs_write_string(unit: i32, ptr: *const u8, len: i64) { |
| 840 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 841 | if let Some(u) = state.get_unit(unit) { |
| 842 | if u.is_unformatted() { |
| 843 | if !ptr.is_null() && len > 0 { |
| 844 | let slice = unsafe { std::slice::from_raw_parts(ptr, len as usize) }; |
| 845 | u.raw_or_buffer(slice); |
| 846 | } |
| 847 | } else { |
| 848 | let _ = u.write_str(" "); |
| 849 | if !ptr.is_null() && len > 0 { |
| 850 | let slice = unsafe { std::slice::from_raw_parts(ptr, len as usize) }; |
| 851 | let _ = u.write_bytes(slice); |
| 852 | } |
| 853 | } |
| 854 | } |
| 855 | } |
| 856 | |
| 857 | /// Write a logical value (list-directed). |
| 858 | #[no_mangle] |
| 859 | pub extern "C" fn afs_write_logical(unit: i32, val: i32) { |
| 860 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 861 | if let Some(u) = state.get_unit(unit) { |
| 862 | if u.is_unformatted() { |
| 863 | u.raw_or_buffer(&val.to_ne_bytes()); |
| 864 | } else { |
| 865 | let _ = u.write_str(if val != 0 { " T" } else { " F" }); |
| 866 | } |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | /// End a write statement (newline). |
| 871 | #[no_mangle] |
| 872 | pub extern "C" fn afs_write_newline(unit: i32) { |
| 873 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 874 | if let Some(u) = state.get_unit(unit) { |
| 875 | if u.is_unformatted() { |
| 876 | // Sequential unformatted: a pending record buffer means |
| 877 | // afs_list_write_end was not called — flush nothing here. |
| 878 | // Stream unformatted has no record terminator. |
| 879 | let _ = u.flush(); |
| 880 | return; |
| 881 | } |
| 882 | let _ = u.write_str("\n"); |
| 883 | let _ = u.flush(); |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | /// Like `afs_write_newline` but no-ops when `advance == 0`. The |
| 888 | /// lowering uses this when `advance=` is a runtime-evaluated string |
| 889 | /// (e.g. `advance=optval(adv, 'YES')`) — `advance` is precomputed by |
| 890 | /// `afs_advance_eval` to 0 (no advance) or 1 (advance). |
| 891 | #[no_mangle] |
| 892 | pub extern "C" fn afs_write_newline_if(unit: i32, advance: i32) { |
| 893 | if advance == 0 { |
| 894 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 895 | if let Some(u) = state.get_unit(unit) { |
| 896 | let _ = u.flush(); |
| 897 | } |
| 898 | return; |
| 899 | } |
| 900 | afs_write_newline(unit); |
| 901 | } |
| 902 | |
| 903 | /// Evaluate an `advance=` string at runtime. Returns 0 when the |
| 904 | /// trimmed, case-folded string equals "no", else 1. The lowering |
| 905 | /// uses this for non-literal advance expressions so that |
| 906 | /// `advance=optval(adv, 'YES')` produces the correct behavior |
| 907 | /// (current lowering only honors string-literal advance values). |
| 908 | #[no_mangle] |
| 909 | pub extern "C" fn afs_advance_eval(ptr: *const u8, len: i64) -> i32 { |
| 910 | if ptr.is_null() || len <= 0 { |
| 911 | return 1; |
| 912 | } |
| 913 | let bytes = unsafe { std::slice::from_raw_parts(ptr, len as usize) }; |
| 914 | let s = std::str::from_utf8(bytes).unwrap_or(""); |
| 915 | if s.trim().eq_ignore_ascii_case("no") { |
| 916 | 0 |
| 917 | } else { |
| 918 | 1 |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | /// Read a formatted character item with runtime advance dispatch. |
| 923 | /// `advance == 0` selects the non-advancing path |
| 924 | /// (`afs_fmt_read_string_noadvance`); any other value uses |
| 925 | /// `afs_fmt_read_string` which advances past the record. Used by the |
| 926 | /// lowering when `advance=` is a non-literal expression and the bool |
| 927 | /// path can't be statically chosen. |
| 928 | #[no_mangle] |
| 929 | pub extern "C" fn afs_fmt_read_string_dyn( |
| 930 | unit: i32, |
| 931 | fmt_str: *const u8, |
| 932 | fmt_len: i64, |
| 933 | data_index: i64, |
| 934 | dest: *mut u8, |
| 935 | dest_len: i64, |
| 936 | size_out: *mut i32, |
| 937 | iostat: *mut i32, |
| 938 | advance: i32, |
| 939 | ) { |
| 940 | if advance == 0 { |
| 941 | afs_fmt_read_string_noadvance(unit, fmt_str, fmt_len, dest, dest_len, size_out, iostat); |
| 942 | } else { |
| 943 | afs_fmt_read_string( |
| 944 | unit, fmt_str, fmt_len, data_index, dest, dest_len, size_out, iostat, |
| 945 | ); |
| 946 | } |
| 947 | } |
| 948 | |
| 949 | /// Begin a list-directed write statement. Mandatory before the first |
| 950 | /// per-item helper when iostat=/iomsg= are requested or when the unit |
| 951 | /// might be sequential-unformatted (which needs record-buffered emit). |
| 952 | /// |
| 953 | /// For formatted units this only resets iostat. For sequential |
| 954 | /// unformatted units it opens a fresh per-statement record buffer that |
| 955 | /// the per-item helpers will append into. Stream-unformatted units skip |
| 956 | /// the buffer (each helper writes raw bytes directly). |
| 957 | #[no_mangle] |
| 958 | pub extern "C" fn afs_list_write_begin( |
| 959 | unit: i32, |
| 960 | iostat: *mut i32, |
| 961 | iomsg: *mut u8, |
| 962 | iomsg_len: i64, |
| 963 | ) { |
| 964 | if !iostat.is_null() { |
| 965 | unsafe { |
| 966 | *iostat = 0; |
| 967 | } |
| 968 | } |
| 969 | if !iomsg.is_null() && iomsg_len > 0 { |
| 970 | let buf = unsafe { std::slice::from_raw_parts_mut(iomsg, iomsg_len as usize) }; |
| 971 | for b in buf.iter_mut() { |
| 972 | *b = b' '; |
| 973 | } |
| 974 | } |
| 975 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 976 | if let Some(u) = state.get_unit(unit) { |
| 977 | if u.form == Form::Unformatted && u.access == Access::Sequential { |
| 978 | u.pending_record = Some(Vec::new()); |
| 979 | } |
| 980 | } else if !iostat.is_null() { |
| 981 | unsafe { |
| 982 | *iostat = 1; |
| 983 | } |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | /// End a list-directed write statement. For sequential unformatted |
| 988 | /// units this drains the per-statement record buffer and writes |
| 989 | /// `[len][bytes][len]` to the stream. For formatted units the trailing |
| 990 | /// newline is left to the per-item path's `afs_write_newline` so we |
| 991 | /// don't double-newline; this only flushes and forwards iostat/iomsg. |
| 992 | /// `advance` is accepted for symmetry with `afs_fmt_end` but is unused |
| 993 | /// by the formatted path here. |
| 994 | #[no_mangle] |
| 995 | pub extern "C" fn afs_list_write_end( |
| 996 | unit: i32, |
| 997 | _advance: i32, |
| 998 | iostat: *mut i32, |
| 999 | iomsg: *mut u8, |
| 1000 | iomsg_len: i64, |
| 1001 | ) { |
| 1002 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1003 | let Some(u) = state.get_unit(unit) else { |
| 1004 | if !iostat.is_null() { |
| 1005 | unsafe { |
| 1006 | *iostat = 1; |
| 1007 | } |
| 1008 | } |
| 1009 | return; |
| 1010 | }; |
| 1011 | let mut err: Option<String> = None; |
| 1012 | if let Some(buf) = u.pending_record.take() { |
| 1013 | let len_bytes = (buf.len() as u32).to_ne_bytes(); |
| 1014 | let r1 = u.write_raw(&len_bytes); |
| 1015 | let r2 = if !buf.is_empty() { |
| 1016 | u.write_raw(&buf) |
| 1017 | } else { |
| 1018 | Ok(()) |
| 1019 | }; |
| 1020 | let r3 = u.write_raw(&len_bytes); |
| 1021 | if let Err(e) = r1.or(r2).or(r3) { |
| 1022 | err = Some(e.to_string()); |
| 1023 | } |
| 1024 | } |
| 1025 | let _ = u.flush(); |
| 1026 | if let Some(msg) = err { |
| 1027 | if !iostat.is_null() { |
| 1028 | unsafe { |
| 1029 | *iostat = 1; |
| 1030 | } |
| 1031 | } |
| 1032 | if !iomsg.is_null() && iomsg_len > 0 { |
| 1033 | let buf = unsafe { std::slice::from_raw_parts_mut(iomsg, iomsg_len as usize) }; |
| 1034 | let bytes = msg.as_bytes(); |
| 1035 | let n = bytes.len().min(buf.len()); |
| 1036 | buf[..n].copy_from_slice(&bytes[..n]); |
| 1037 | for b in buf[n..].iter_mut() { |
| 1038 | *b = b' '; |
| 1039 | } |
| 1040 | } |
| 1041 | } |
| 1042 | } |
| 1043 | |
| 1044 | // ---- Public C API: List-directed READ ---- |
| 1045 | |
| 1046 | /// Read an i32 value (list-directed) from a unit. |
| 1047 | /// Uses token buffer: multiple values on one line are consumed left-to-right. |
| 1048 | #[no_mangle] |
| 1049 | pub extern "C" fn afs_read_int(unit: i32, val: *mut i32, iostat: *mut i32) { |
| 1050 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1051 | if let Some(u) = state.get_unit(unit) { |
| 1052 | if let Some(bytes) = u.read_buffer_take(4) { |
| 1053 | let mut b = [0u8; 4]; |
| 1054 | b.copy_from_slice(&bytes); |
| 1055 | if !val.is_null() { |
| 1056 | unsafe { |
| 1057 | *val = i32::from_ne_bytes(b); |
| 1058 | } |
| 1059 | } |
| 1060 | if !iostat.is_null() { |
| 1061 | unsafe { |
| 1062 | *iostat = 0; |
| 1063 | } |
| 1064 | } |
| 1065 | return; |
| 1066 | } |
| 1067 | match u.next_read_token() { |
| 1068 | Ok(Some(token)) => match token.parse::<i32>() { |
| 1069 | Ok(v) => { |
| 1070 | if !val.is_null() { |
| 1071 | unsafe { |
| 1072 | *val = v; |
| 1073 | } |
| 1074 | } |
| 1075 | if !iostat.is_null() { |
| 1076 | unsafe { |
| 1077 | *iostat = 0; |
| 1078 | } |
| 1079 | } |
| 1080 | } |
| 1081 | Err(_) => { |
| 1082 | if !iostat.is_null() { |
| 1083 | unsafe { |
| 1084 | *iostat = 1; |
| 1085 | } |
| 1086 | } else { |
| 1087 | eprintln!("READ: cannot parse integer from '{}'", token); |
| 1088 | std::process::exit(1); |
| 1089 | } |
| 1090 | } |
| 1091 | }, |
| 1092 | Ok(None) => { |
| 1093 | if !iostat.is_null() { |
| 1094 | unsafe { |
| 1095 | *iostat = IOSTAT_END; |
| 1096 | } |
| 1097 | } else { |
| 1098 | eprintln!("READ: end of file"); |
| 1099 | std::process::exit(1); |
| 1100 | } |
| 1101 | } |
| 1102 | Err(e) => { |
| 1103 | if !iostat.is_null() { |
| 1104 | unsafe { |
| 1105 | *iostat = 1; |
| 1106 | } |
| 1107 | } else { |
| 1108 | eprintln!("READ: {}", e); |
| 1109 | std::process::exit(1); |
| 1110 | } |
| 1111 | } |
| 1112 | } |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | /// Read an i64 value (list-directed). |
| 1117 | #[no_mangle] |
| 1118 | pub extern "C" fn afs_read_int64(unit: i32, val: *mut i64, iostat: *mut i32) { |
| 1119 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1120 | if let Some(u) = state.get_unit(unit) { |
| 1121 | if let Some(bytes) = u.read_buffer_take(8) { |
| 1122 | let mut b = [0u8; 8]; |
| 1123 | b.copy_from_slice(&bytes); |
| 1124 | if !val.is_null() { |
| 1125 | unsafe { |
| 1126 | *val = i64::from_ne_bytes(b); |
| 1127 | } |
| 1128 | } |
| 1129 | if !iostat.is_null() { |
| 1130 | unsafe { |
| 1131 | *iostat = 0; |
| 1132 | } |
| 1133 | } |
| 1134 | return; |
| 1135 | } |
| 1136 | match u.next_read_token() { |
| 1137 | Ok(Some(token)) => match token.parse::<i64>() { |
| 1138 | Ok(v) => { |
| 1139 | if !val.is_null() { |
| 1140 | unsafe { |
| 1141 | *val = v; |
| 1142 | } |
| 1143 | } |
| 1144 | if !iostat.is_null() { |
| 1145 | unsafe { |
| 1146 | *iostat = 0; |
| 1147 | } |
| 1148 | } |
| 1149 | } |
| 1150 | Err(_) => { |
| 1151 | if !iostat.is_null() { |
| 1152 | unsafe { |
| 1153 | *iostat = 1; |
| 1154 | } |
| 1155 | } else { |
| 1156 | eprintln!("READ: cannot parse integer from '{}'", token); |
| 1157 | std::process::exit(1); |
| 1158 | } |
| 1159 | } |
| 1160 | }, |
| 1161 | Ok(None) => { |
| 1162 | if !iostat.is_null() { |
| 1163 | unsafe { |
| 1164 | *iostat = IOSTAT_END; |
| 1165 | } |
| 1166 | } |
| 1167 | } |
| 1168 | Err(_) => { |
| 1169 | if !iostat.is_null() { |
| 1170 | unsafe { |
| 1171 | *iostat = 1; |
| 1172 | } |
| 1173 | } |
| 1174 | } |
| 1175 | } |
| 1176 | } |
| 1177 | } |
| 1178 | |
| 1179 | /// Read an i128 value (list-directed). |
| 1180 | #[no_mangle] |
| 1181 | pub extern "C" fn afs_read_int128(unit: i32, val: *mut i128, iostat: *mut i32) { |
| 1182 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1183 | if let Some(u) = state.get_unit(unit) { |
| 1184 | if let Some(bytes) = u.read_buffer_take(16) { |
| 1185 | let mut b = [0u8; 16]; |
| 1186 | b.copy_from_slice(&bytes); |
| 1187 | write_i128_ptr(val, i128::from_ne_bytes(b)); |
| 1188 | if !iostat.is_null() { |
| 1189 | unsafe { |
| 1190 | *iostat = 0; |
| 1191 | } |
| 1192 | } |
| 1193 | return; |
| 1194 | } |
| 1195 | match u.next_read_token() { |
| 1196 | Ok(Some(token)) => match token.parse::<i128>() { |
| 1197 | Ok(v) => { |
| 1198 | write_i128_ptr(val, v); |
| 1199 | if !iostat.is_null() { |
| 1200 | unsafe { |
| 1201 | *iostat = 0; |
| 1202 | } |
| 1203 | } |
| 1204 | } |
| 1205 | Err(_) => { |
| 1206 | if !iostat.is_null() { |
| 1207 | unsafe { |
| 1208 | *iostat = 1; |
| 1209 | } |
| 1210 | } else { |
| 1211 | eprintln!("READ: cannot parse integer from '{}'", token); |
| 1212 | std::process::exit(1); |
| 1213 | } |
| 1214 | } |
| 1215 | }, |
| 1216 | Ok(None) => { |
| 1217 | if !iostat.is_null() { |
| 1218 | unsafe { |
| 1219 | *iostat = IOSTAT_END; |
| 1220 | } |
| 1221 | } |
| 1222 | } |
| 1223 | Err(_) => { |
| 1224 | if !iostat.is_null() { |
| 1225 | unsafe { |
| 1226 | *iostat = 1; |
| 1227 | } |
| 1228 | } |
| 1229 | } |
| 1230 | } |
| 1231 | } |
| 1232 | } |
| 1233 | |
| 1234 | /// Read an f32 value (list-directed). |
| 1235 | #[no_mangle] |
| 1236 | pub extern "C" fn afs_read_real(unit: i32, val: *mut f32, iostat: *mut i32) { |
| 1237 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1238 | if let Some(u) = state.get_unit(unit) { |
| 1239 | if let Some(bytes) = u.read_buffer_take(4) { |
| 1240 | let mut b = [0u8; 4]; |
| 1241 | b.copy_from_slice(&bytes); |
| 1242 | if !val.is_null() { |
| 1243 | unsafe { |
| 1244 | *val = f32::from_ne_bytes(b); |
| 1245 | } |
| 1246 | } |
| 1247 | if !iostat.is_null() { |
| 1248 | unsafe { |
| 1249 | *iostat = 0; |
| 1250 | } |
| 1251 | } |
| 1252 | return; |
| 1253 | } |
| 1254 | match u.next_read_token() { |
| 1255 | Ok(Some(token)) => { |
| 1256 | // Handle Fortran D-exponent: replace D with E for parsing. |
| 1257 | let normalized = token.replace('d', "e").replace('D', "E"); |
| 1258 | match normalized.parse::<f32>() { |
| 1259 | Ok(v) => { |
| 1260 | if !val.is_null() { |
| 1261 | unsafe { |
| 1262 | *val = v; |
| 1263 | } |
| 1264 | } |
| 1265 | if !iostat.is_null() { |
| 1266 | unsafe { |
| 1267 | *iostat = 0; |
| 1268 | } |
| 1269 | } |
| 1270 | } |
| 1271 | Err(_) => { |
| 1272 | if !iostat.is_null() { |
| 1273 | unsafe { |
| 1274 | *iostat = 1; |
| 1275 | } |
| 1276 | } else { |
| 1277 | eprintln!("READ: cannot parse real from '{}'", token); |
| 1278 | std::process::exit(1); |
| 1279 | } |
| 1280 | } |
| 1281 | } |
| 1282 | } |
| 1283 | Ok(None) => { |
| 1284 | if !iostat.is_null() { |
| 1285 | unsafe { |
| 1286 | *iostat = IOSTAT_END; |
| 1287 | } |
| 1288 | } else { |
| 1289 | eprintln!("READ: end of file"); |
| 1290 | std::process::exit(1); |
| 1291 | } |
| 1292 | } |
| 1293 | Err(_) => { |
| 1294 | if !iostat.is_null() { |
| 1295 | unsafe { |
| 1296 | *iostat = 1; |
| 1297 | } |
| 1298 | } |
| 1299 | } |
| 1300 | } |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | /// Read an f64 value (list-directed). |
| 1305 | #[no_mangle] |
| 1306 | pub extern "C" fn afs_read_real64(unit: i32, val: *mut f64, iostat: *mut i32) { |
| 1307 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1308 | if let Some(u) = state.get_unit(unit) { |
| 1309 | if let Some(bytes) = u.read_buffer_take(8) { |
| 1310 | let mut b = [0u8; 8]; |
| 1311 | b.copy_from_slice(&bytes); |
| 1312 | if !val.is_null() { |
| 1313 | unsafe { |
| 1314 | *val = f64::from_ne_bytes(b); |
| 1315 | } |
| 1316 | } |
| 1317 | if !iostat.is_null() { |
| 1318 | unsafe { |
| 1319 | *iostat = 0; |
| 1320 | } |
| 1321 | } |
| 1322 | return; |
| 1323 | } |
| 1324 | match u.next_read_token() { |
| 1325 | Ok(Some(token)) => { |
| 1326 | let normalized = token.replace('d', "e").replace('D', "E"); |
| 1327 | match normalized.parse::<f64>() { |
| 1328 | Ok(v) => { |
| 1329 | if !val.is_null() { |
| 1330 | unsafe { |
| 1331 | *val = v; |
| 1332 | } |
| 1333 | } |
| 1334 | if !iostat.is_null() { |
| 1335 | unsafe { |
| 1336 | *iostat = 0; |
| 1337 | } |
| 1338 | } |
| 1339 | } |
| 1340 | Err(_) => { |
| 1341 | if !iostat.is_null() { |
| 1342 | unsafe { |
| 1343 | *iostat = 1; |
| 1344 | } |
| 1345 | } else { |
| 1346 | eprintln!("READ: cannot parse real from '{}'", token); |
| 1347 | std::process::exit(1); |
| 1348 | } |
| 1349 | } |
| 1350 | } |
| 1351 | } |
| 1352 | Ok(None) => { |
| 1353 | if !iostat.is_null() { |
| 1354 | unsafe { |
| 1355 | *iostat = IOSTAT_END; |
| 1356 | } |
| 1357 | } |
| 1358 | } |
| 1359 | Err(_) => { |
| 1360 | if !iostat.is_null() { |
| 1361 | unsafe { |
| 1362 | *iostat = 1; |
| 1363 | } |
| 1364 | } |
| 1365 | } |
| 1366 | } |
| 1367 | } |
| 1368 | } |
| 1369 | |
| 1370 | /// Begin a list-directed READ statement. Mandatory before per-item |
| 1371 | /// helpers when iostat=/iomsg= are requested or when the unit may be |
| 1372 | /// sequential-unformatted (which needs the leading record marker |
| 1373 | /// consumed and the data slurped into a buffer for typed take-bytes). |
| 1374 | /// |
| 1375 | /// For formatted units this only resets iostat. For sequential |
| 1376 | /// unformatted units it reads `[u32 len][len bytes][u32 trailer]`, |
| 1377 | /// stashes the data in `pending_read`, and the per-item helpers will |
| 1378 | /// consume from there. Stream-unformatted reads continue using their |
| 1379 | /// existing per-helper raw-byte path. |
| 1380 | #[no_mangle] |
| 1381 | pub extern "C" fn afs_list_read_begin( |
| 1382 | unit: i32, |
| 1383 | iostat: *mut i32, |
| 1384 | iomsg: *mut u8, |
| 1385 | iomsg_len: i64, |
| 1386 | ) { |
| 1387 | if !iostat.is_null() { |
| 1388 | unsafe { |
| 1389 | *iostat = 0; |
| 1390 | } |
| 1391 | } |
| 1392 | if !iomsg.is_null() && iomsg_len > 0 { |
| 1393 | let buf = unsafe { std::slice::from_raw_parts_mut(iomsg, iomsg_len as usize) }; |
| 1394 | for b in buf.iter_mut() { |
| 1395 | *b = b' '; |
| 1396 | } |
| 1397 | } |
| 1398 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1399 | let Some(u) = state.get_unit(unit) else { |
| 1400 | if !iostat.is_null() { |
| 1401 | unsafe { |
| 1402 | *iostat = 1; |
| 1403 | } |
| 1404 | } |
| 1405 | return; |
| 1406 | }; |
| 1407 | if !(u.form == Form::Unformatted && u.access == Access::Sequential) { |
| 1408 | return; |
| 1409 | } |
| 1410 | let mut len_buf = [0u8; 4]; |
| 1411 | match u.read_raw(&mut len_buf) { |
| 1412 | Ok(4) => {} |
| 1413 | Ok(0) => { |
| 1414 | if !iostat.is_null() { |
| 1415 | unsafe { |
| 1416 | *iostat = IOSTAT_END; |
| 1417 | } |
| 1418 | } |
| 1419 | return; |
| 1420 | } |
| 1421 | _ => { |
| 1422 | if !iostat.is_null() { |
| 1423 | unsafe { |
| 1424 | *iostat = 1; |
| 1425 | } |
| 1426 | } |
| 1427 | return; |
| 1428 | } |
| 1429 | } |
| 1430 | let record_len = u32::from_ne_bytes(len_buf) as usize; |
| 1431 | let mut data = vec![0u8; record_len]; |
| 1432 | if record_len > 0 && u.read_raw(&mut data).is_err() && !iostat.is_null() { |
| 1433 | unsafe { |
| 1434 | *iostat = 1; |
| 1435 | } |
| 1436 | return; |
| 1437 | } |
| 1438 | let mut trailer = [0u8; 4]; |
| 1439 | let _ = u.read_raw(&mut trailer); |
| 1440 | u.pending_read = Some((data, 0)); |
| 1441 | } |
| 1442 | |
| 1443 | /// End a list-directed READ statement. Drops any unread bytes left in |
| 1444 | /// the in-flight unformatted record buffer (the standard does not |
| 1445 | /// require the program to consume the entire record). |
| 1446 | #[no_mangle] |
| 1447 | pub extern "C" fn afs_list_read_end( |
| 1448 | unit: i32, |
| 1449 | _iostat: *mut i32, |
| 1450 | _iomsg: *mut u8, |
| 1451 | _iomsg_len: i64, |
| 1452 | ) { |
| 1453 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1454 | if let Some(u) = state.get_unit(unit) { |
| 1455 | u.pending_read = None; |
| 1456 | } |
| 1457 | } |
| 1458 | |
| 1459 | /// Advance the file position past one record on a list-directed READ |
| 1460 | /// statement that has no input items: `read(unit, *)` (no items) is |
| 1461 | /// defined by F2018 §12.6.4.5 to position the unit at the next record. |
| 1462 | /// stdlib's `number_of_rows(s)` counts rows by repeating exactly that |
| 1463 | /// statement until a nonzero iostat — without this helper the loop is |
| 1464 | /// infinite because the unit never advances and iostat is never set. |
| 1465 | #[no_mangle] |
| 1466 | pub extern "C" fn afs_read_skip_record(unit: i32, iostat: *mut i32) { |
| 1467 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1468 | let Some(u) = state.get_unit(unit) else { |
| 1469 | if !iostat.is_null() { |
| 1470 | unsafe { *iostat = 1 }; |
| 1471 | } |
| 1472 | return; |
| 1473 | }; |
| 1474 | // Drain any pre-tokenized values from the previous list-directed |
| 1475 | // read so the next iteration genuinely consumes a new record. |
| 1476 | u.read_tokens.clear(); |
| 1477 | match u.read_line() { |
| 1478 | Ok(s) if s.is_empty() => { |
| 1479 | if !iostat.is_null() { |
| 1480 | unsafe { *iostat = IOSTAT_END }; |
| 1481 | } |
| 1482 | } |
| 1483 | Ok(_) => { |
| 1484 | if !iostat.is_null() { |
| 1485 | unsafe { *iostat = 0 }; |
| 1486 | } |
| 1487 | } |
| 1488 | Err(_) => { |
| 1489 | if !iostat.is_null() { |
| 1490 | unsafe { *iostat = 1 }; |
| 1491 | } |
| 1492 | } |
| 1493 | } |
| 1494 | } |
| 1495 | |
| 1496 | #[no_mangle] |
| 1497 | pub extern "C" fn afs_read_string(unit: i32, dest: *mut u8, dest_len: i64, iostat: *mut i32) { |
| 1498 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1499 | let Some(u) = state.get_unit(unit) else { |
| 1500 | if !iostat.is_null() { |
| 1501 | unsafe { |
| 1502 | *iostat = 1; |
| 1503 | } |
| 1504 | } |
| 1505 | return; |
| 1506 | }; |
| 1507 | |
| 1508 | if dest_len < 0 { |
| 1509 | if !iostat.is_null() { |
| 1510 | unsafe { |
| 1511 | *iostat = 1; |
| 1512 | } |
| 1513 | } |
| 1514 | return; |
| 1515 | } |
| 1516 | |
| 1517 | if let Some(bytes) = u.read_buffer_take(dest_len as usize) { |
| 1518 | crate::string::afs_assign_char_fixed(dest, dest_len, bytes.as_ptr(), dest_len); |
| 1519 | if !iostat.is_null() { |
| 1520 | unsafe { |
| 1521 | *iostat = 0; |
| 1522 | } |
| 1523 | } |
| 1524 | return; |
| 1525 | } |
| 1526 | |
| 1527 | if u.form == Form::Unformatted && u.access == Access::Stream { |
| 1528 | let mut bytes = vec![b' '; dest_len as usize]; |
| 1529 | match u.read_raw(&mut bytes) { |
| 1530 | Ok(0) => { |
| 1531 | crate::string::afs_assign_char_fixed(dest, dest_len, std::ptr::null(), 0); |
| 1532 | if !iostat.is_null() { |
| 1533 | unsafe { |
| 1534 | *iostat = IOSTAT_END; |
| 1535 | } |
| 1536 | } |
| 1537 | } |
| 1538 | Ok(n) => { |
| 1539 | crate::string::afs_assign_char_fixed(dest, dest_len, bytes.as_ptr(), n as i64); |
| 1540 | if !iostat.is_null() { |
| 1541 | unsafe { |
| 1542 | *iostat = 0; |
| 1543 | } |
| 1544 | } |
| 1545 | } |
| 1546 | Err(_) => { |
| 1547 | crate::string::afs_assign_char_fixed(dest, dest_len, std::ptr::null(), 0); |
| 1548 | if !iostat.is_null() { |
| 1549 | unsafe { |
| 1550 | *iostat = 1; |
| 1551 | } |
| 1552 | } |
| 1553 | } |
| 1554 | } |
| 1555 | return; |
| 1556 | } |
| 1557 | |
| 1558 | match u.next_read_token() { |
| 1559 | Ok(Some(token)) => { |
| 1560 | crate::string::afs_assign_char_fixed( |
| 1561 | dest, |
| 1562 | dest_len, |
| 1563 | token.as_ptr(), |
| 1564 | token.len() as i64, |
| 1565 | ); |
| 1566 | if !iostat.is_null() { |
| 1567 | unsafe { |
| 1568 | *iostat = 0; |
| 1569 | } |
| 1570 | } |
| 1571 | } |
| 1572 | Ok(None) => { |
| 1573 | crate::string::afs_assign_char_fixed(dest, dest_len, std::ptr::null(), 0); |
| 1574 | if !iostat.is_null() { |
| 1575 | unsafe { |
| 1576 | *iostat = IOSTAT_END; |
| 1577 | } |
| 1578 | } |
| 1579 | } |
| 1580 | Err(_) => { |
| 1581 | crate::string::afs_assign_char_fixed(dest, dest_len, std::ptr::null(), 0); |
| 1582 | if !iostat.is_null() { |
| 1583 | unsafe { |
| 1584 | *iostat = 1; |
| 1585 | } |
| 1586 | } |
| 1587 | } |
| 1588 | } |
| 1589 | } |
| 1590 | |
| 1591 | // ---- Helpers ---- |
| 1592 | |
| 1593 | fn unsafe_str(ptr: *const u8, len: i64) -> String { |
| 1594 | if ptr.is_null() || len <= 0 { |
| 1595 | String::new() |
| 1596 | } else { |
| 1597 | let slice = unsafe { std::slice::from_raw_parts(ptr, len as usize) }; |
| 1598 | String::from_utf8_lossy(slice).into_owned() |
| 1599 | } |
| 1600 | } |
| 1601 | |
| 1602 | // ---- Direct access helpers ---- |
| 1603 | |
| 1604 | impl Unit { |
| 1605 | /// Seek to a specific record for direct access. |
| 1606 | /// Record numbers are 1-based. Returns Ok(()) or Err on failure. |
| 1607 | fn seek_to_record(&mut self, rec: i64) -> io::Result<()> { |
| 1608 | if rec < 1 { |
| 1609 | return Err(io::Error::new( |
| 1610 | io::ErrorKind::InvalidInput, |
| 1611 | "direct access record number must be >= 1", |
| 1612 | )); |
| 1613 | } |
| 1614 | let recl = self.recl.ok_or_else(|| { |
| 1615 | io::Error::new(io::ErrorKind::InvalidInput, "direct access requires RECL") |
| 1616 | })?; |
| 1617 | let offset = (rec - 1) |
| 1618 | .checked_mul(recl) |
| 1619 | .ok_or_else(|| io::Error::new(io::ErrorKind::InvalidInput, "record offset overflow"))?; |
| 1620 | if offset < 0 { |
| 1621 | return Err(io::Error::new( |
| 1622 | io::ErrorKind::InvalidInput, |
| 1623 | "negative record offset", |
| 1624 | )); |
| 1625 | } |
| 1626 | match &mut self.stream { |
| 1627 | UnitStream::FileRaw(f) => { |
| 1628 | f.seek(SeekFrom::Start(offset as u64))?; |
| 1629 | Ok(()) |
| 1630 | } |
| 1631 | _ => Err(io::Error::new( |
| 1632 | io::ErrorKind::InvalidInput, |
| 1633 | "unit not opened for direct access", |
| 1634 | )), |
| 1635 | } |
| 1636 | } |
| 1637 | |
| 1638 | /// Write raw bytes at the current file position (for unformatted/stream I/O). |
| 1639 | fn write_raw(&mut self, data: &[u8]) -> io::Result<()> { |
| 1640 | match &mut self.stream { |
| 1641 | UnitStream::FileRaw(f) => f.write_all(data), |
| 1642 | UnitStream::FileWrite(w) => w.write_all(data), |
| 1643 | _ => Err(io::Error::new( |
| 1644 | io::ErrorKind::PermissionDenied, |
| 1645 | "unit not open for writing", |
| 1646 | )), |
| 1647 | } |
| 1648 | } |
| 1649 | |
| 1650 | /// Read raw bytes at the current file position (for unformatted/stream I/O). |
| 1651 | fn read_raw(&mut self, buf: &mut [u8]) -> io::Result<usize> { |
| 1652 | match &mut self.stream { |
| 1653 | UnitStream::FileRaw(f) => f.read(buf), |
| 1654 | UnitStream::FileRead(r) => r.read(buf), |
| 1655 | _ => Err(io::Error::new( |
| 1656 | io::ErrorKind::PermissionDenied, |
| 1657 | "unit not open for reading", |
| 1658 | )), |
| 1659 | } |
| 1660 | } |
| 1661 | } |
| 1662 | |
| 1663 | /// Write a direct-access record (formatted string padded to recl). |
| 1664 | #[no_mangle] |
| 1665 | pub extern "C" fn afs_write_direct( |
| 1666 | unit: i32, |
| 1667 | rec: i64, |
| 1668 | data: *const u8, |
| 1669 | data_len: i64, |
| 1670 | iostat: *mut i32, |
| 1671 | ) { |
| 1672 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1673 | if let Some(u) = state.get_unit(unit) { |
| 1674 | if let Err(e) = u.seek_to_record(rec) { |
| 1675 | if !iostat.is_null() { |
| 1676 | unsafe { |
| 1677 | *iostat = 1; |
| 1678 | } |
| 1679 | } else { |
| 1680 | eprintln!("WRITE direct: {}", e); |
| 1681 | std::process::exit(1); |
| 1682 | } |
| 1683 | return; |
| 1684 | } |
| 1685 | let recl = u.recl.unwrap_or(0) as usize; |
| 1686 | let mut record = vec![b' '; recl]; // space-padded |
| 1687 | let copy_len = (data_len as usize).min(recl); |
| 1688 | if !data.is_null() && copy_len > 0 { |
| 1689 | unsafe { |
| 1690 | std::ptr::copy_nonoverlapping(data, record.as_mut_ptr(), copy_len); |
| 1691 | } |
| 1692 | } |
| 1693 | if let Err(e) = u.write_raw(&record) { |
| 1694 | if !iostat.is_null() { |
| 1695 | unsafe { |
| 1696 | *iostat = 1; |
| 1697 | } |
| 1698 | } else { |
| 1699 | eprintln!("WRITE direct: {}", e); |
| 1700 | std::process::exit(1); |
| 1701 | } |
| 1702 | return; |
| 1703 | } |
| 1704 | if !iostat.is_null() { |
| 1705 | unsafe { |
| 1706 | *iostat = 0; |
| 1707 | } |
| 1708 | } |
| 1709 | } |
| 1710 | } |
| 1711 | |
| 1712 | /// Read a direct-access record. |
| 1713 | #[no_mangle] |
| 1714 | pub extern "C" fn afs_read_direct( |
| 1715 | unit: i32, |
| 1716 | rec: i64, |
| 1717 | data: *mut u8, |
| 1718 | data_len: i64, |
| 1719 | iostat: *mut i32, |
| 1720 | ) { |
| 1721 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1722 | if let Some(u) = state.get_unit(unit) { |
| 1723 | if let Err(e) = u.seek_to_record(rec) { |
| 1724 | if !iostat.is_null() { |
| 1725 | unsafe { |
| 1726 | *iostat = 1; |
| 1727 | } |
| 1728 | } else { |
| 1729 | eprintln!("READ direct: {}", e); |
| 1730 | std::process::exit(1); |
| 1731 | } |
| 1732 | return; |
| 1733 | } |
| 1734 | let recl = u.recl.unwrap_or(0) as usize; |
| 1735 | let mut record = vec![0u8; recl]; |
| 1736 | match u.read_raw(&mut record) { |
| 1737 | Ok(n) => { |
| 1738 | let copy_len = n.min(data_len as usize); |
| 1739 | if !data.is_null() && copy_len > 0 { |
| 1740 | unsafe { |
| 1741 | std::ptr::copy_nonoverlapping(record.as_ptr(), data, copy_len); |
| 1742 | } |
| 1743 | } |
| 1744 | // Pad remainder with spaces. |
| 1745 | if copy_len < data_len as usize { |
| 1746 | unsafe { |
| 1747 | std::ptr::write_bytes( |
| 1748 | data.add(copy_len), |
| 1749 | b' ', |
| 1750 | data_len as usize - copy_len, |
| 1751 | ); |
| 1752 | } |
| 1753 | } |
| 1754 | if !iostat.is_null() { |
| 1755 | unsafe { |
| 1756 | *iostat = 0; |
| 1757 | } |
| 1758 | } |
| 1759 | } |
| 1760 | Err(e) => { |
| 1761 | if !iostat.is_null() { |
| 1762 | unsafe { |
| 1763 | *iostat = 1; |
| 1764 | } |
| 1765 | } else { |
| 1766 | eprintln!("READ direct: {}", e); |
| 1767 | std::process::exit(1); |
| 1768 | } |
| 1769 | } |
| 1770 | } |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | // ---- Unformatted sequential I/O ---- |
| 1775 | |
| 1776 | /// Write an unformatted record with 4-byte length markers (gfortran-compatible). |
| 1777 | #[no_mangle] |
| 1778 | pub extern "C" fn afs_write_unformatted( |
| 1779 | unit: i32, |
| 1780 | data: *const u8, |
| 1781 | data_len: i64, |
| 1782 | iostat: *mut i32, |
| 1783 | ) { |
| 1784 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1785 | if let Some(u) = state.get_unit(unit) { |
| 1786 | if data_len < 0 || data_len > u32::MAX as i64 { |
| 1787 | if !iostat.is_null() { |
| 1788 | unsafe { |
| 1789 | *iostat = 1; |
| 1790 | } |
| 1791 | } else { |
| 1792 | eprintln!( |
| 1793 | "WRITE unformatted: record length {} exceeds 4GB limit", |
| 1794 | data_len |
| 1795 | ); |
| 1796 | std::process::exit(1); |
| 1797 | } |
| 1798 | return; |
| 1799 | } |
| 1800 | let len_bytes = (data_len as u32).to_ne_bytes(); |
| 1801 | // Write: [len][data][len] |
| 1802 | let r1 = u.write_raw(&len_bytes); |
| 1803 | let r2 = if !data.is_null() && data_len > 0 { |
| 1804 | let slice = unsafe { std::slice::from_raw_parts(data, data_len as usize) }; |
| 1805 | u.write_raw(slice) |
| 1806 | } else { |
| 1807 | Ok(()) |
| 1808 | }; |
| 1809 | let r3 = u.write_raw(&len_bytes); |
| 1810 | if r1.is_err() || r2.is_err() || r3.is_err() { |
| 1811 | if !iostat.is_null() { |
| 1812 | unsafe { |
| 1813 | *iostat = 1; |
| 1814 | } |
| 1815 | } |
| 1816 | } else { |
| 1817 | if !iostat.is_null() { |
| 1818 | unsafe { |
| 1819 | *iostat = 0; |
| 1820 | } |
| 1821 | } |
| 1822 | } |
| 1823 | } |
| 1824 | } |
| 1825 | |
| 1826 | /// Read an unformatted record with 4-byte length markers. |
| 1827 | #[no_mangle] |
| 1828 | pub extern "C" fn afs_read_unformatted( |
| 1829 | unit: i32, |
| 1830 | data: *mut u8, |
| 1831 | max_len: i64, |
| 1832 | actual_len: *mut i64, |
| 1833 | iostat: *mut i32, |
| 1834 | ) { |
| 1835 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1836 | if let Some(u) = state.get_unit(unit) { |
| 1837 | // Read leading length marker. |
| 1838 | let mut len_buf = [0u8; 4]; |
| 1839 | match u.read_raw(&mut len_buf) { |
| 1840 | Ok(4) => {} |
| 1841 | Ok(0) => { |
| 1842 | if !iostat.is_null() { |
| 1843 | unsafe { |
| 1844 | *iostat = IOSTAT_END; |
| 1845 | } |
| 1846 | } |
| 1847 | return; |
| 1848 | } |
| 1849 | _ => { |
| 1850 | if !iostat.is_null() { |
| 1851 | unsafe { |
| 1852 | *iostat = 1; |
| 1853 | } |
| 1854 | } |
| 1855 | return; |
| 1856 | } |
| 1857 | } |
| 1858 | let record_len = u32::from_ne_bytes(len_buf) as usize; |
| 1859 | if !actual_len.is_null() { |
| 1860 | unsafe { |
| 1861 | *actual_len = record_len as i64; |
| 1862 | } |
| 1863 | } |
| 1864 | |
| 1865 | // Read record data. |
| 1866 | let read_len = record_len.min(max_len as usize); |
| 1867 | if !data.is_null() && read_len > 0 { |
| 1868 | let slice = unsafe { std::slice::from_raw_parts_mut(data, read_len) }; |
| 1869 | let _ = u.read_raw(slice); |
| 1870 | } |
| 1871 | // Skip remaining if record is longer than buffer. |
| 1872 | if record_len > max_len as usize { |
| 1873 | let skip = record_len - max_len as usize; |
| 1874 | let mut trash = vec![0u8; skip]; |
| 1875 | let _ = u.read_raw(&mut trash); |
| 1876 | } |
| 1877 | |
| 1878 | // Read trailing length marker (and discard). |
| 1879 | let _ = u.read_raw(&mut len_buf); |
| 1880 | if !iostat.is_null() { |
| 1881 | unsafe { |
| 1882 | *iostat = 0; |
| 1883 | } |
| 1884 | } |
| 1885 | } |
| 1886 | } |
| 1887 | |
| 1888 | // ---- Stream access helpers ---- |
| 1889 | |
| 1890 | /// Write raw bytes at the current stream position. |
| 1891 | #[no_mangle] |
| 1892 | pub extern "C" fn afs_write_stream(unit: i32, data: *const u8, data_len: i64, iostat: *mut i32) { |
| 1893 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1894 | if let Some(u) = state.get_unit(unit) { |
| 1895 | if !data.is_null() && data_len > 0 { |
| 1896 | let slice = unsafe { std::slice::from_raw_parts(data, data_len as usize) }; |
| 1897 | match u.write_raw(slice) { |
| 1898 | Ok(()) => { |
| 1899 | if !iostat.is_null() { |
| 1900 | unsafe { |
| 1901 | *iostat = 0; |
| 1902 | } |
| 1903 | } |
| 1904 | } |
| 1905 | Err(_) => { |
| 1906 | if !iostat.is_null() { |
| 1907 | unsafe { |
| 1908 | *iostat = 1; |
| 1909 | } |
| 1910 | } |
| 1911 | } |
| 1912 | } |
| 1913 | } |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | /// Seek to an absolute byte position in a stream unit. |
| 1918 | #[no_mangle] |
| 1919 | pub extern "C" fn afs_seek_stream(unit: i32, pos: i64, iostat: *mut i32) { |
| 1920 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1921 | if let Some(u) = state.get_unit(unit) { |
| 1922 | match &mut u.stream { |
| 1923 | UnitStream::FileRaw(f) => match f.seek(SeekFrom::Start(pos as u64)) { |
| 1924 | Ok(_) => { |
| 1925 | if !iostat.is_null() { |
| 1926 | unsafe { |
| 1927 | *iostat = 0; |
| 1928 | } |
| 1929 | } |
| 1930 | } |
| 1931 | Err(_) => { |
| 1932 | if !iostat.is_null() { |
| 1933 | unsafe { |
| 1934 | *iostat = 1; |
| 1935 | } |
| 1936 | } |
| 1937 | } |
| 1938 | }, |
| 1939 | _ => { |
| 1940 | if !iostat.is_null() { |
| 1941 | unsafe { |
| 1942 | *iostat = 1; |
| 1943 | } |
| 1944 | } |
| 1945 | } |
| 1946 | } |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | // ---- NAMELIST I/O ---- |
| 1951 | |
| 1952 | /// A NAMELIST entry describing one variable in a namelist group. |
| 1953 | #[repr(C)] |
| 1954 | pub struct NamelistEntry { |
| 1955 | pub name: *const u8, |
| 1956 | pub name_len: i64, |
| 1957 | pub data: *mut u8, |
| 1958 | pub data_type: i32, // 0=int, 1=real, 2=string, 3=logical |
| 1959 | pub data_len: i64, // string length for type 2 |
| 1960 | } |
| 1961 | |
| 1962 | /// Write a NAMELIST group to a unit. |
| 1963 | /// Format: &GROUPNAME var=val, var=val, ... / |
| 1964 | #[no_mangle] |
| 1965 | pub extern "C" fn afs_write_namelist( |
| 1966 | unit: i32, |
| 1967 | group_name: *const u8, |
| 1968 | group_name_len: i64, |
| 1969 | entries: *const NamelistEntry, |
| 1970 | n_entries: i32, |
| 1971 | ) { |
| 1972 | let gname = unsafe_str(group_name, group_name_len); |
| 1973 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 1974 | if let Some(u) = state.get_unit(unit) { |
| 1975 | let _ = u.write_str(&format!(" &{}", gname.to_uppercase())); |
| 1976 | |
| 1977 | if !entries.is_null() && n_entries > 0 { |
| 1978 | let slice = unsafe { std::slice::from_raw_parts(entries, n_entries as usize) }; |
| 1979 | for (i, entry) in slice.iter().enumerate() { |
| 1980 | let name = unsafe_str(entry.name, entry.name_len); |
| 1981 | let sep = if i > 0 { "," } else { "" }; |
| 1982 | let val_str = match entry.data_type { |
| 1983 | 0 => { |
| 1984 | // integer |
| 1985 | let v = unsafe { *(entry.data as *const i32) }; |
| 1986 | format!("{}", v) |
| 1987 | } |
| 1988 | 1 => { |
| 1989 | // real |
| 1990 | let v = unsafe { *(entry.data as *const f64) }; |
| 1991 | format!("{}", v) |
| 1992 | } |
| 1993 | 2 => { |
| 1994 | // string |
| 1995 | let s = unsafe_str(entry.data, entry.data_len); |
| 1996 | format!("'{}'", s.trim_end()) |
| 1997 | } |
| 1998 | 3 => { |
| 1999 | // logical |
| 2000 | let v = unsafe { *(entry.data as *const i32) }; |
| 2001 | (if v != 0 { ".TRUE." } else { ".FALSE." }).to_string() |
| 2002 | } |
| 2003 | _ => "???".to_string(), |
| 2004 | }; |
| 2005 | let _ = u.write_str(&format!("{} {}={}", sep, name.to_uppercase(), val_str)); |
| 2006 | } |
| 2007 | } |
| 2008 | let _ = u.write_str(" /\n"); |
| 2009 | let _ = u.flush(); |
| 2010 | } |
| 2011 | } |
| 2012 | |
| 2013 | /// Read a NAMELIST group from a unit. |
| 2014 | /// Parses &GROUPNAME var=val, ... / format. |
| 2015 | #[no_mangle] |
| 2016 | pub extern "C" fn afs_read_namelist( |
| 2017 | unit: i32, |
| 2018 | group_name: *const u8, |
| 2019 | group_name_len: i64, |
| 2020 | entries: *const NamelistEntry, |
| 2021 | n_entries: i32, |
| 2022 | iostat: *mut i32, |
| 2023 | ) { |
| 2024 | let gname = unsafe_str(group_name, group_name_len).to_lowercase(); |
| 2025 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 2026 | if let Some(u) = state.get_unit(unit) { |
| 2027 | // Read lines until we find &groupname. |
| 2028 | let mut all_lines = String::new(); |
| 2029 | loop { |
| 2030 | match u.read_line() { |
| 2031 | Ok(line) => { |
| 2032 | let trimmed = line.trim().to_lowercase(); |
| 2033 | if trimmed.starts_with('&') && trimmed[1..].starts_with(&gname) { |
| 2034 | all_lines.push_str(&line); |
| 2035 | // Keep reading until we find '/'. |
| 2036 | while !all_lines.contains('/') { |
| 2037 | match u.read_line() { |
| 2038 | Ok(cont) => all_lines.push_str(&cont), |
| 2039 | Err(_) => break, |
| 2040 | } |
| 2041 | } |
| 2042 | break; |
| 2043 | } |
| 2044 | } |
| 2045 | Err(_) => { |
| 2046 | if !iostat.is_null() { |
| 2047 | unsafe { |
| 2048 | *iostat = IOSTAT_END; |
| 2049 | } |
| 2050 | } |
| 2051 | return; |
| 2052 | } |
| 2053 | } |
| 2054 | } |
| 2055 | |
| 2056 | // Parse assignments from the namelist text. |
| 2057 | if !entries.is_null() && n_entries > 0 { |
| 2058 | let entries_slice = unsafe { std::slice::from_raw_parts(entries, n_entries as usize) }; |
| 2059 | // Extract the content between & and /. |
| 2060 | let content = if let Some(start) = all_lines.find(&gname) { |
| 2061 | let after_name = &all_lines[start + gname.len()..]; |
| 2062 | if let Some(end) = after_name.find('/') { |
| 2063 | &after_name[..end] |
| 2064 | } else { |
| 2065 | after_name |
| 2066 | } |
| 2067 | } else { |
| 2068 | "" |
| 2069 | }; |
| 2070 | |
| 2071 | // Parse var=val pairs. Supports: |
| 2072 | // var=val — simple scalar assignment |
| 2073 | // var(index)=val — array element assignment (1-based) |
| 2074 | // var=n*val — repeat notation (set n consecutive elements) |
| 2075 | for pair in content.split(',') { |
| 2076 | let pair = pair.trim(); |
| 2077 | if let Some(eq_pos) = pair.find('=') { |
| 2078 | let lhs = pair[..eq_pos].trim().to_lowercase(); |
| 2079 | let val_str = pair[eq_pos + 1..].trim(); |
| 2080 | |
| 2081 | // Parse array index from "var(idx)" syntax. |
| 2082 | let (var_name, array_index) = if let Some(paren) = lhs.find('(') { |
| 2083 | let name = lhs[..paren].trim(); |
| 2084 | let idx_str = lhs[paren + 1..].trim_end_matches(')').trim(); |
| 2085 | let idx = idx_str.parse::<usize>().unwrap_or(1); |
| 2086 | (name.to_string(), Some(idx)) |
| 2087 | } else { |
| 2088 | (lhs, None) |
| 2089 | }; |
| 2090 | |
| 2091 | // Parse repeat notation "n*val". |
| 2092 | let (repeat_count, actual_val) = if let Some(star) = val_str.find('*') { |
| 2093 | // Make sure * is preceded by digits (not part of a number like 1.5E*). |
| 2094 | let before = val_str[..star].trim(); |
| 2095 | if let Ok(n) = before.parse::<usize>() { |
| 2096 | (n, val_str[star + 1..].trim()) |
| 2097 | } else { |
| 2098 | (1, val_str) |
| 2099 | } |
| 2100 | } else { |
| 2101 | (1, val_str) |
| 2102 | }; |
| 2103 | |
| 2104 | // Find the matching entry. |
| 2105 | for entry in entries_slice { |
| 2106 | if entry.data.is_null() { |
| 2107 | continue; |
| 2108 | } |
| 2109 | let ename = unsafe_str(entry.name, entry.name_len).to_lowercase(); |
| 2110 | if ename == var_name { |
| 2111 | namelist_assign_value(entry, actual_val, array_index, repeat_count); |
| 2112 | break; |
| 2113 | } |
| 2114 | } |
| 2115 | } |
| 2116 | } |
| 2117 | } |
| 2118 | if !iostat.is_null() { |
| 2119 | unsafe { |
| 2120 | *iostat = 0; |
| 2121 | } |
| 2122 | } |
| 2123 | } |
| 2124 | } |
| 2125 | |
| 2126 | /// Assign a parsed NAMELIST value to an entry, handling array indexing and repeat. |
| 2127 | fn namelist_assign_value( |
| 2128 | entry: &NamelistEntry, |
| 2129 | val_str: &str, |
| 2130 | index: Option<usize>, |
| 2131 | repeat: usize, |
| 2132 | ) { |
| 2133 | // For array elements, compute byte offset from 1-based index. |
| 2134 | let elem_size = match entry.data_type { |
| 2135 | 0 => 4, // integer (i32) |
| 2136 | 1 => 8, // real (f64) |
| 2137 | 3 => 4, // logical (i32) |
| 2138 | _ => 1, // string |
| 2139 | }; |
| 2140 | let base_offset = index |
| 2141 | .map(|i| (i.saturating_sub(1)) * elem_size) |
| 2142 | .unwrap_or(0); |
| 2143 | |
| 2144 | for r in 0..repeat { |
| 2145 | let offset = base_offset + r * elem_size; |
| 2146 | let ptr = unsafe { entry.data.add(offset) }; |
| 2147 | match entry.data_type { |
| 2148 | 0 => { |
| 2149 | // integer |
| 2150 | if let Ok(v) = val_str.parse::<i32>() { |
| 2151 | unsafe { |
| 2152 | *(ptr as *mut i32) = v; |
| 2153 | } |
| 2154 | } |
| 2155 | } |
| 2156 | 1 => { |
| 2157 | // real |
| 2158 | let normalized = val_str.replace('d', "e").replace('D', "E"); |
| 2159 | if let Ok(v) = normalized.parse::<f64>() { |
| 2160 | unsafe { |
| 2161 | *(ptr as *mut f64) = v; |
| 2162 | } |
| 2163 | } |
| 2164 | } |
| 2165 | 2 => { |
| 2166 | // string (only first element for repeat, no array stride for strings) |
| 2167 | let s = val_str.trim_matches('\'').trim_matches('"'); |
| 2168 | let bytes = s.as_bytes(); |
| 2169 | let copy_len = bytes.len().min(entry.data_len as usize); |
| 2170 | if copy_len > 0 { |
| 2171 | unsafe { |
| 2172 | std::ptr::copy_nonoverlapping(bytes.as_ptr(), entry.data, copy_len); |
| 2173 | if copy_len < entry.data_len as usize { |
| 2174 | std::ptr::write_bytes( |
| 2175 | entry.data.add(copy_len), |
| 2176 | b' ', |
| 2177 | entry.data_len as usize - copy_len, |
| 2178 | ); |
| 2179 | } |
| 2180 | } |
| 2181 | } |
| 2182 | return; // string repeat doesn't make sense |
| 2183 | } |
| 2184 | 3 => { |
| 2185 | // logical |
| 2186 | let lower = val_str.to_lowercase(); |
| 2187 | let v = lower.starts_with(".t") || lower.starts_with("t"); |
| 2188 | unsafe { |
| 2189 | *(ptr as *mut i32) = v as i32; |
| 2190 | } |
| 2191 | } |
| 2192 | _ => {} |
| 2193 | } |
| 2194 | } |
| 2195 | } |
| 2196 | |
| 2197 | // ---- Internal I/O (read/write to character variables) ---- |
| 2198 | |
| 2199 | /// Write a formatted integer to a character buffer (internal I/O). |
| 2200 | #[no_mangle] |
| 2201 | pub extern "C" fn afs_write_internal_int( |
| 2202 | buf: *mut u8, |
| 2203 | buf_len: i64, |
| 2204 | val: i32, |
| 2205 | pos: *mut i64, // current write position, updated after write |
| 2206 | ) { |
| 2207 | if buf.is_null() || buf_len <= 0 { |
| 2208 | return; |
| 2209 | } |
| 2210 | let s = format!(" {}", val); |
| 2211 | let start = if !pos.is_null() { |
| 2212 | (unsafe { *pos }) as usize |
| 2213 | } else { |
| 2214 | 0 |
| 2215 | }; |
| 2216 | write_to_buffer(buf, buf_len as usize, start, s.as_bytes(), pos); |
| 2217 | } |
| 2218 | |
| 2219 | /// Write a formatted i64 to a character buffer (internal I/O). |
| 2220 | #[no_mangle] |
| 2221 | pub extern "C" fn afs_write_internal_int64(buf: *mut u8, buf_len: i64, val: i64, pos: *mut i64) { |
| 2222 | if buf.is_null() || buf_len <= 0 { |
| 2223 | return; |
| 2224 | } |
| 2225 | let s = format!(" {}", val); |
| 2226 | let start = if !pos.is_null() { |
| 2227 | (unsafe { *pos }) as usize |
| 2228 | } else { |
| 2229 | 0 |
| 2230 | }; |
| 2231 | write_to_buffer(buf, buf_len as usize, start, s.as_bytes(), pos); |
| 2232 | } |
| 2233 | |
| 2234 | /// Write a formatted integer(16) to a character buffer (internal I/O). |
| 2235 | #[no_mangle] |
| 2236 | pub extern "C" fn afs_write_internal_int128(buf: *mut u8, buf_len: i64, val: i128, pos: *mut i64) { |
| 2237 | if buf.is_null() || buf_len <= 0 { |
| 2238 | return; |
| 2239 | } |
| 2240 | let s = format!(" {}", val); |
| 2241 | let start = if !pos.is_null() { |
| 2242 | (unsafe { *pos }) as usize |
| 2243 | } else { |
| 2244 | 0 |
| 2245 | }; |
| 2246 | write_to_buffer(buf, buf_len as usize, start, s.as_bytes(), pos); |
| 2247 | } |
| 2248 | |
| 2249 | /// Write a formatted real to a character buffer (internal I/O). |
| 2250 | #[no_mangle] |
| 2251 | pub extern "C" fn afs_write_internal_real64(buf: *mut u8, buf_len: i64, val: f64, pos: *mut i64) { |
| 2252 | if buf.is_null() || buf_len <= 0 { |
| 2253 | return; |
| 2254 | } |
| 2255 | let s = format!(" {}", val); |
| 2256 | let start = if !pos.is_null() { |
| 2257 | (unsafe { *pos }) as usize |
| 2258 | } else { |
| 2259 | 0 |
| 2260 | }; |
| 2261 | write_to_buffer(buf, buf_len as usize, start, s.as_bytes(), pos); |
| 2262 | } |
| 2263 | |
| 2264 | /// Write a formatted string to a character buffer (internal I/O). |
| 2265 | #[no_mangle] |
| 2266 | pub extern "C" fn afs_write_internal_string( |
| 2267 | buf: *mut u8, |
| 2268 | buf_len: i64, |
| 2269 | src: *const u8, |
| 2270 | src_len: i64, |
| 2271 | pos: *mut i64, |
| 2272 | ) { |
| 2273 | if buf.is_null() || buf_len <= 0 { |
| 2274 | return; |
| 2275 | } |
| 2276 | let start = if !pos.is_null() { |
| 2277 | (unsafe { *pos }) as usize |
| 2278 | } else { |
| 2279 | 0 |
| 2280 | }; |
| 2281 | let mut data = vec![b' ']; |
| 2282 | if !src.is_null() && src_len > 0 { |
| 2283 | let slice = unsafe { std::slice::from_raw_parts(src, src_len as usize) }; |
| 2284 | data.extend_from_slice(slice); |
| 2285 | } |
| 2286 | write_to_buffer(buf, buf_len as usize, start, &data, pos); |
| 2287 | } |
| 2288 | |
| 2289 | fn next_internal_token(buf: *const u8, buf_len: i64, pos: *mut i64) -> Option<String> { |
| 2290 | if buf.is_null() || buf_len <= 0 { |
| 2291 | return None; |
| 2292 | } |
| 2293 | |
| 2294 | let slice = unsafe { std::slice::from_raw_parts(buf, buf_len as usize) }; |
| 2295 | let mut idx = if !pos.is_null() { |
| 2296 | unsafe { (*pos).clamp(0, buf_len) as usize } |
| 2297 | } else { |
| 2298 | 0 |
| 2299 | }; |
| 2300 | |
| 2301 | while idx < slice.len() && (slice[idx].is_ascii_whitespace() || slice[idx] == b',') { |
| 2302 | idx += 1; |
| 2303 | } |
| 2304 | |
| 2305 | if idx >= slice.len() { |
| 2306 | if !pos.is_null() { |
| 2307 | unsafe { |
| 2308 | *pos = idx as i64; |
| 2309 | } |
| 2310 | } |
| 2311 | return None; |
| 2312 | } |
| 2313 | |
| 2314 | let start = idx; |
| 2315 | while idx < slice.len() && !slice[idx].is_ascii_whitespace() && slice[idx] != b',' { |
| 2316 | idx += 1; |
| 2317 | } |
| 2318 | |
| 2319 | if !pos.is_null() { |
| 2320 | unsafe { |
| 2321 | *pos = idx as i64; |
| 2322 | } |
| 2323 | } |
| 2324 | |
| 2325 | Some(String::from_utf8_lossy(&slice[start..idx]).into_owned()) |
| 2326 | } |
| 2327 | |
| 2328 | /// Read an integer from a character buffer (internal I/O). |
| 2329 | #[no_mangle] |
| 2330 | pub extern "C" fn afs_read_internal_int( |
| 2331 | buf: *const u8, |
| 2332 | buf_len: i64, |
| 2333 | pos: *mut i64, |
| 2334 | val: *mut i32, |
| 2335 | iostat: *mut i32, |
| 2336 | ) { |
| 2337 | if let Some(token) = next_internal_token(buf, buf_len, pos) { |
| 2338 | match token.replace(',', "").parse::<i32>() { |
| 2339 | Ok(v) => { |
| 2340 | if !val.is_null() { |
| 2341 | unsafe { |
| 2342 | *val = v; |
| 2343 | } |
| 2344 | } |
| 2345 | if !iostat.is_null() { |
| 2346 | unsafe { |
| 2347 | *iostat = 0; |
| 2348 | } |
| 2349 | } |
| 2350 | } |
| 2351 | Err(_) => { |
| 2352 | if !iostat.is_null() { |
| 2353 | unsafe { |
| 2354 | *iostat = 1; |
| 2355 | } |
| 2356 | } |
| 2357 | } |
| 2358 | } |
| 2359 | } else { |
| 2360 | if !iostat.is_null() { |
| 2361 | unsafe { |
| 2362 | *iostat = -1; |
| 2363 | } |
| 2364 | } |
| 2365 | } |
| 2366 | } |
| 2367 | |
| 2368 | /// Read an i64 from a character buffer (internal I/O). |
| 2369 | #[no_mangle] |
| 2370 | pub extern "C" fn afs_read_internal_int64( |
| 2371 | buf: *const u8, |
| 2372 | buf_len: i64, |
| 2373 | pos: *mut i64, |
| 2374 | val: *mut i64, |
| 2375 | iostat: *mut i32, |
| 2376 | ) { |
| 2377 | if let Some(token) = next_internal_token(buf, buf_len, pos) { |
| 2378 | match token.replace(',', "").parse::<i64>() { |
| 2379 | Ok(v) => { |
| 2380 | if !val.is_null() { |
| 2381 | unsafe { |
| 2382 | *val = v; |
| 2383 | } |
| 2384 | } |
| 2385 | if !iostat.is_null() { |
| 2386 | unsafe { |
| 2387 | *iostat = 0; |
| 2388 | } |
| 2389 | } |
| 2390 | } |
| 2391 | Err(_) => { |
| 2392 | if !iostat.is_null() { |
| 2393 | unsafe { |
| 2394 | *iostat = 1; |
| 2395 | } |
| 2396 | } |
| 2397 | } |
| 2398 | } |
| 2399 | } else { |
| 2400 | if !iostat.is_null() { |
| 2401 | unsafe { |
| 2402 | *iostat = -1; |
| 2403 | } |
| 2404 | } |
| 2405 | } |
| 2406 | } |
| 2407 | |
| 2408 | /// Read an integer(16) from a character buffer (internal I/O). |
| 2409 | #[no_mangle] |
| 2410 | pub extern "C" fn afs_read_internal_int128( |
| 2411 | buf: *const u8, |
| 2412 | buf_len: i64, |
| 2413 | pos: *mut i64, |
| 2414 | val: *mut i128, |
| 2415 | iostat: *mut i32, |
| 2416 | ) { |
| 2417 | if let Some(token) = next_internal_token(buf, buf_len, pos) { |
| 2418 | match token.replace(',', "").parse::<i128>() { |
| 2419 | Ok(v) => { |
| 2420 | write_i128_ptr(val, v); |
| 2421 | if !iostat.is_null() { |
| 2422 | unsafe { |
| 2423 | *iostat = 0; |
| 2424 | } |
| 2425 | } |
| 2426 | } |
| 2427 | Err(_) => { |
| 2428 | if !iostat.is_null() { |
| 2429 | unsafe { |
| 2430 | *iostat = 1; |
| 2431 | } |
| 2432 | } |
| 2433 | } |
| 2434 | } |
| 2435 | } else { |
| 2436 | if !iostat.is_null() { |
| 2437 | unsafe { |
| 2438 | *iostat = -1; |
| 2439 | } |
| 2440 | } |
| 2441 | } |
| 2442 | } |
| 2443 | |
| 2444 | /// Read a real from a character buffer (internal I/O). |
| 2445 | #[no_mangle] |
| 2446 | pub extern "C" fn afs_read_internal_real( |
| 2447 | buf: *const u8, |
| 2448 | buf_len: i64, |
| 2449 | pos: *mut i64, |
| 2450 | val: *mut f64, |
| 2451 | iostat: *mut i32, |
| 2452 | ) { |
| 2453 | if let Some(token) = next_internal_token(buf, buf_len, pos) { |
| 2454 | let normalized = token.replace('d', "e").replace('D', "E").replace(',', ""); |
| 2455 | match normalized.parse::<f64>() { |
| 2456 | Ok(v) => { |
| 2457 | if !val.is_null() { |
| 2458 | unsafe { |
| 2459 | *val = v; |
| 2460 | } |
| 2461 | } |
| 2462 | if !iostat.is_null() { |
| 2463 | unsafe { |
| 2464 | *iostat = 0; |
| 2465 | } |
| 2466 | } |
| 2467 | } |
| 2468 | Err(_) => { |
| 2469 | if !iostat.is_null() { |
| 2470 | unsafe { |
| 2471 | *iostat = 1; |
| 2472 | } |
| 2473 | } |
| 2474 | } |
| 2475 | } |
| 2476 | } else { |
| 2477 | if !iostat.is_null() { |
| 2478 | unsafe { |
| 2479 | *iostat = -1; |
| 2480 | } |
| 2481 | } |
| 2482 | } |
| 2483 | } |
| 2484 | |
| 2485 | /// Helper: write bytes into a buffer at a given position, space-pad remainder. |
| 2486 | fn write_to_buffer(buf: *mut u8, buf_len: usize, start: usize, data: &[u8], pos: *mut i64) { |
| 2487 | let copy_len = data.len().min(buf_len.saturating_sub(start)); |
| 2488 | if copy_len > 0 { |
| 2489 | unsafe { |
| 2490 | std::ptr::copy_nonoverlapping(data.as_ptr(), buf.add(start), copy_len); |
| 2491 | } |
| 2492 | } |
| 2493 | // Space-pad remaining buffer. |
| 2494 | let end = start + copy_len; |
| 2495 | if end < buf_len { |
| 2496 | unsafe { |
| 2497 | std::ptr::write_bytes(buf.add(end), b' ', buf_len - end); |
| 2498 | } |
| 2499 | } |
| 2500 | if !pos.is_null() { |
| 2501 | unsafe { |
| 2502 | *pos = end as i64; |
| 2503 | } |
| 2504 | } |
| 2505 | } |
| 2506 | |
| 2507 | // ---- BACKSPACE / ENDFILE ---- |
| 2508 | |
| 2509 | /// Backspace one record on a sequential unit. |
| 2510 | /// For formatted: seek backwards past the previous newline. |
| 2511 | #[no_mangle] |
| 2512 | pub extern "C" fn afs_backspace(unit: i32, iostat: *mut i32) { |
| 2513 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 2514 | if let Some(u) = state.get_unit(unit) { |
| 2515 | match &mut u.stream { |
| 2516 | UnitStream::FileRaw(f) => { |
| 2517 | // Simple approach: seek backwards byte-by-byte to find newline. |
| 2518 | let pos = f.stream_position().unwrap_or(0); |
| 2519 | if pos <= 1 { |
| 2520 | let _ = f.seek(SeekFrom::Start(0)); |
| 2521 | if !iostat.is_null() { |
| 2522 | unsafe { |
| 2523 | *iostat = 0; |
| 2524 | } |
| 2525 | } |
| 2526 | // Clear stale read tokens. |
| 2527 | u.read_tokens.clear(); |
| 2528 | return; |
| 2529 | } |
| 2530 | // Skip the current newline at pos-1. |
| 2531 | let mut search_pos = pos - 2; |
| 2532 | loop { |
| 2533 | f.seek(SeekFrom::Start(search_pos)).ok(); |
| 2534 | let mut byte = [0u8; 1]; |
| 2535 | if f.read(&mut byte).unwrap_or(0) == 0 { |
| 2536 | break; |
| 2537 | } |
| 2538 | if byte[0] == b'\n' { |
| 2539 | f.seek(SeekFrom::Start(search_pos + 1)).ok(); |
| 2540 | break; |
| 2541 | } |
| 2542 | if search_pos == 0 { |
| 2543 | f.seek(SeekFrom::Start(0)).ok(); |
| 2544 | break; |
| 2545 | } |
| 2546 | search_pos -= 1; |
| 2547 | } |
| 2548 | // Clear stale read tokens after repositioning. |
| 2549 | u.read_tokens.clear(); |
| 2550 | if !iostat.is_null() { |
| 2551 | unsafe { |
| 2552 | *iostat = 0; |
| 2553 | } |
| 2554 | } |
| 2555 | } |
| 2556 | _ => { |
| 2557 | // Sequential buffered files: backspace is not well-supported. |
| 2558 | if !iostat.is_null() { |
| 2559 | unsafe { |
| 2560 | *iostat = 0; |
| 2561 | } |
| 2562 | } |
| 2563 | } |
| 2564 | } |
| 2565 | } |
| 2566 | } |
| 2567 | |
| 2568 | /// Write an end-of-file marker and truncate. |
| 2569 | #[no_mangle] |
| 2570 | pub extern "C" fn afs_endfile(unit: i32, iostat: *mut i32) { |
| 2571 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 2572 | if let Some(u) = state.get_unit(unit) { |
| 2573 | let _ = u.flush(); |
| 2574 | if let UnitStream::FileRaw(f) = &mut u.stream { |
| 2575 | let pos = f.stream_position().unwrap_or(0); |
| 2576 | let _ = f.set_len(pos); // truncate at current position |
| 2577 | } |
| 2578 | if !iostat.is_null() { |
| 2579 | unsafe { |
| 2580 | *iostat = 0; |
| 2581 | } |
| 2582 | } |
| 2583 | } |
| 2584 | } |
| 2585 | |
| 2586 | // ---- IOSTAT constants (iso_fortran_env) ---- |
| 2587 | |
| 2588 | /// IOSTAT_END: end-of-file encountered during input. |
| 2589 | pub const IOSTAT_END: i32 = -1; |
| 2590 | /// IOSTAT_EOR: end-of-record encountered during non-advancing input. |
| 2591 | pub const IOSTAT_EOR: i32 = -2; |
| 2592 | |
| 2593 | // ---- INQUIRE ---- |
| 2594 | |
| 2595 | /// Write a Fortran-style string result into a caller-provided buffer. |
| 2596 | /// Pads with spaces to buf_len (Fortran CHARACTER semantics). |
| 2597 | fn write_inquire_string(buf: *mut u8, buf_len: i64, value: &str) { |
| 2598 | if buf.is_null() || buf_len <= 0 { |
| 2599 | return; |
| 2600 | } |
| 2601 | let n = buf_len as usize; |
| 2602 | let val_bytes = value.as_bytes(); |
| 2603 | let copy_len = val_bytes.len().min(n); |
| 2604 | unsafe { |
| 2605 | std::ptr::copy_nonoverlapping(val_bytes.as_ptr(), buf, copy_len); |
| 2606 | // Pad remainder with spaces. |
| 2607 | if copy_len < n { |
| 2608 | std::ptr::write_bytes(buf.add(copy_len), b' ', n - copy_len); |
| 2609 | } |
| 2610 | } |
| 2611 | } |
| 2612 | |
| 2613 | /// INQUIRE by file: check if a file exists, report its properties. |
| 2614 | #[no_mangle] |
| 2615 | pub extern "C" fn afs_inquire_file( |
| 2616 | filename: *const u8, |
| 2617 | filename_len: i64, |
| 2618 | exist: *mut i32, |
| 2619 | opened: *mut i32, |
| 2620 | iostat: *mut i32, |
| 2621 | // Extended specifiers — pass null for any not needed. |
| 2622 | name_buf: *mut u8, |
| 2623 | name_buf_len: i64, |
| 2624 | access_buf: *mut u8, |
| 2625 | access_buf_len: i64, |
| 2626 | form_buf: *mut u8, |
| 2627 | form_buf_len: i64, |
| 2628 | action_buf: *mut u8, |
| 2629 | action_buf_len: i64, |
| 2630 | recl_out: *mut i64, |
| 2631 | size_out: *mut i64, |
| 2632 | read_buf: *mut u8, |
| 2633 | read_buf_len: i64, |
| 2634 | write_buf: *mut u8, |
| 2635 | write_buf_len: i64, |
| 2636 | readwrite_buf: *mut u8, |
| 2637 | readwrite_buf_len: i64, |
| 2638 | ) { |
| 2639 | let fname = unsafe_str(filename, filename_len); |
| 2640 | |
| 2641 | let file_exists = std::path::Path::new(&fname).exists(); |
| 2642 | if !exist.is_null() { |
| 2643 | unsafe { |
| 2644 | *exist = file_exists as i32; |
| 2645 | } |
| 2646 | } |
| 2647 | |
| 2648 | // Find unit connected to this file (if any). |
| 2649 | let state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 2650 | let connected_unit = state.units.values().find(|u| u.filename == fname); |
| 2651 | |
| 2652 | if !opened.is_null() { |
| 2653 | unsafe { |
| 2654 | *opened = connected_unit.is_some() as i32; |
| 2655 | } |
| 2656 | } |
| 2657 | |
| 2658 | write_inquire_string(name_buf, name_buf_len, &fname); |
| 2659 | |
| 2660 | if let Some(u) = connected_unit { |
| 2661 | write_unit_properties( |
| 2662 | u, |
| 2663 | access_buf, |
| 2664 | access_buf_len, |
| 2665 | form_buf, |
| 2666 | form_buf_len, |
| 2667 | action_buf, |
| 2668 | action_buf_len, |
| 2669 | recl_out, |
| 2670 | ); |
| 2671 | write_action_capabilities( |
| 2672 | Some(u.action), |
| 2673 | read_buf, |
| 2674 | read_buf_len, |
| 2675 | write_buf, |
| 2676 | write_buf_len, |
| 2677 | readwrite_buf, |
| 2678 | readwrite_buf_len, |
| 2679 | ); |
| 2680 | } else { |
| 2681 | write_inquire_string(access_buf, access_buf_len, "UNDEFINED"); |
| 2682 | write_inquire_string(form_buf, form_buf_len, "UNDEFINED"); |
| 2683 | write_inquire_string(action_buf, action_buf_len, "UNDEFINED"); |
| 2684 | write_action_capabilities( |
| 2685 | None, |
| 2686 | read_buf, |
| 2687 | read_buf_len, |
| 2688 | write_buf, |
| 2689 | write_buf_len, |
| 2690 | readwrite_buf, |
| 2691 | readwrite_buf_len, |
| 2692 | ); |
| 2693 | } |
| 2694 | |
| 2695 | // File size via metadata. |
| 2696 | if !size_out.is_null() { |
| 2697 | let sz = std::fs::metadata(&fname) |
| 2698 | .map(|m| m.len() as i64) |
| 2699 | .unwrap_or(-1); |
| 2700 | unsafe { |
| 2701 | *size_out = sz; |
| 2702 | } |
| 2703 | } |
| 2704 | |
| 2705 | if !iostat.is_null() { |
| 2706 | unsafe { |
| 2707 | *iostat = 0; |
| 2708 | } |
| 2709 | } |
| 2710 | } |
| 2711 | |
| 2712 | /// INQUIRE by unit: check if a unit is connected, report its properties. |
| 2713 | #[no_mangle] |
| 2714 | pub extern "C" fn afs_inquire_unit( |
| 2715 | unit: i32, |
| 2716 | exist: *mut i32, |
| 2717 | opened: *mut i32, |
| 2718 | iostat: *mut i32, |
| 2719 | // Extended specifiers. |
| 2720 | name_buf: *mut u8, |
| 2721 | name_buf_len: i64, |
| 2722 | access_buf: *mut u8, |
| 2723 | access_buf_len: i64, |
| 2724 | form_buf: *mut u8, |
| 2725 | form_buf_len: i64, |
| 2726 | action_buf: *mut u8, |
| 2727 | action_buf_len: i64, |
| 2728 | recl_out: *mut i64, |
| 2729 | size_out: *mut i64, |
| 2730 | read_buf: *mut u8, |
| 2731 | read_buf_len: i64, |
| 2732 | write_buf: *mut u8, |
| 2733 | write_buf_len: i64, |
| 2734 | readwrite_buf: *mut u8, |
| 2735 | readwrite_buf_len: i64, |
| 2736 | ) { |
| 2737 | let state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 2738 | let unit_entry = state.units.get(&unit); |
| 2739 | |
| 2740 | if !exist.is_null() { |
| 2741 | unsafe { |
| 2742 | *exist = unit_entry.is_some() as i32; |
| 2743 | } |
| 2744 | } |
| 2745 | if !opened.is_null() { |
| 2746 | unsafe { |
| 2747 | *opened = unit_entry.is_some() as i32; |
| 2748 | } |
| 2749 | } |
| 2750 | |
| 2751 | if let Some(u) = unit_entry { |
| 2752 | write_inquire_string(name_buf, name_buf_len, &u.filename); |
| 2753 | write_unit_properties( |
| 2754 | u, |
| 2755 | access_buf, |
| 2756 | access_buf_len, |
| 2757 | form_buf, |
| 2758 | form_buf_len, |
| 2759 | action_buf, |
| 2760 | action_buf_len, |
| 2761 | recl_out, |
| 2762 | ); |
| 2763 | write_action_capabilities( |
| 2764 | Some(u.action), |
| 2765 | read_buf, |
| 2766 | read_buf_len, |
| 2767 | write_buf, |
| 2768 | write_buf_len, |
| 2769 | readwrite_buf, |
| 2770 | readwrite_buf_len, |
| 2771 | ); |
| 2772 | |
| 2773 | if !size_out.is_null() { |
| 2774 | let sz = if !u.filename.is_empty() { |
| 2775 | std::fs::metadata(&u.filename) |
| 2776 | .map(|m| m.len() as i64) |
| 2777 | .unwrap_or(-1) |
| 2778 | } else { |
| 2779 | -1 |
| 2780 | }; |
| 2781 | unsafe { |
| 2782 | *size_out = sz; |
| 2783 | } |
| 2784 | } |
| 2785 | } else { |
| 2786 | write_inquire_string(name_buf, name_buf_len, ""); |
| 2787 | write_inquire_string(access_buf, access_buf_len, "UNDEFINED"); |
| 2788 | write_inquire_string(form_buf, form_buf_len, "UNDEFINED"); |
| 2789 | write_inquire_string(action_buf, action_buf_len, "UNDEFINED"); |
| 2790 | write_action_capabilities( |
| 2791 | None, |
| 2792 | read_buf, |
| 2793 | read_buf_len, |
| 2794 | write_buf, |
| 2795 | write_buf_len, |
| 2796 | readwrite_buf, |
| 2797 | readwrite_buf_len, |
| 2798 | ); |
| 2799 | if !size_out.is_null() { |
| 2800 | unsafe { |
| 2801 | *size_out = -1; |
| 2802 | } |
| 2803 | } |
| 2804 | } |
| 2805 | |
| 2806 | if !iostat.is_null() { |
| 2807 | unsafe { |
| 2808 | *iostat = 0; |
| 2809 | } |
| 2810 | } |
| 2811 | } |
| 2812 | |
| 2813 | /// Fill READ=, WRITE=, READWRITE= INQUIRE specifiers based on a unit's |
| 2814 | /// declared `Action`. Per F2018 §12.10.2, READ returns YES if the unit |
| 2815 | /// can be read, NO otherwise, and similarly for WRITE. Disconnected |
| 2816 | /// units (`action = None`) report UNKNOWN for all three. |
| 2817 | fn write_action_capabilities( |
| 2818 | action: Option<Action>, |
| 2819 | read_buf: *mut u8, |
| 2820 | read_buf_len: i64, |
| 2821 | write_buf: *mut u8, |
| 2822 | write_buf_len: i64, |
| 2823 | readwrite_buf: *mut u8, |
| 2824 | readwrite_buf_len: i64, |
| 2825 | ) { |
| 2826 | let (read_cap, write_cap, rw_cap) = match action { |
| 2827 | Some(Action::Read) => ("YES", "NO", "NO"), |
| 2828 | Some(Action::Write) => ("NO", "YES", "NO"), |
| 2829 | Some(Action::ReadWrite) => ("YES", "YES", "YES"), |
| 2830 | None => ("UNKNOWN", "UNKNOWN", "UNKNOWN"), |
| 2831 | }; |
| 2832 | write_inquire_string(read_buf, read_buf_len, read_cap); |
| 2833 | write_inquire_string(write_buf, write_buf_len, write_cap); |
| 2834 | write_inquire_string(readwrite_buf, readwrite_buf_len, rw_cap); |
| 2835 | } |
| 2836 | |
| 2837 | /// Write ACCESS, FORM, ACTION, RECL for a connected unit. |
| 2838 | fn write_unit_properties( |
| 2839 | u: &Unit, |
| 2840 | access_buf: *mut u8, |
| 2841 | access_buf_len: i64, |
| 2842 | form_buf: *mut u8, |
| 2843 | form_buf_len: i64, |
| 2844 | action_buf: *mut u8, |
| 2845 | action_buf_len: i64, |
| 2846 | recl_out: *mut i64, |
| 2847 | ) { |
| 2848 | let access_str = match u.access { |
| 2849 | Access::Sequential => "SEQUENTIAL", |
| 2850 | Access::Direct => "DIRECT", |
| 2851 | Access::Stream => "STREAM", |
| 2852 | }; |
| 2853 | write_inquire_string(access_buf, access_buf_len, access_str); |
| 2854 | |
| 2855 | let form_str = match u.form { |
| 2856 | Form::Formatted => "FORMATTED", |
| 2857 | Form::Unformatted => "UNFORMATTED", |
| 2858 | }; |
| 2859 | write_inquire_string(form_buf, form_buf_len, form_str); |
| 2860 | |
| 2861 | let action_str = match u.action { |
| 2862 | Action::Read => "READ", |
| 2863 | Action::Write => "WRITE", |
| 2864 | Action::ReadWrite => "READWRITE", |
| 2865 | }; |
| 2866 | write_inquire_string(action_buf, action_buf_len, action_str); |
| 2867 | |
| 2868 | if !recl_out.is_null() { |
| 2869 | unsafe { |
| 2870 | *recl_out = u.recl.unwrap_or(-1); |
| 2871 | } |
| 2872 | } |
| 2873 | } |
| 2874 | |
| 2875 | // ---- FLUSH ---- |
| 2876 | |
| 2877 | /// Flush a unit's output buffer. |
| 2878 | #[no_mangle] |
| 2879 | pub extern "C" fn afs_flush(unit: i32, iostat: *mut i32) { |
| 2880 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 2881 | if let Some(u) = state.get_unit(unit) { |
| 2882 | match u.flush() { |
| 2883 | Ok(()) => { |
| 2884 | if !iostat.is_null() { |
| 2885 | unsafe { |
| 2886 | *iostat = 0; |
| 2887 | } |
| 2888 | } |
| 2889 | } |
| 2890 | Err(e) => { |
| 2891 | if !iostat.is_null() { |
| 2892 | unsafe { |
| 2893 | *iostat = e.raw_os_error().unwrap_or(1); |
| 2894 | } |
| 2895 | } |
| 2896 | } |
| 2897 | } |
| 2898 | } |
| 2899 | } |
| 2900 | |
| 2901 | // ---- REWIND / BACKSPACE / ENDFILE ---- |
| 2902 | |
| 2903 | /// Rewind a unit to the beginning. |
| 2904 | #[no_mangle] |
| 2905 | pub extern "C" fn afs_rewind(unit: i32, iostat: *mut i32) { |
| 2906 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 2907 | if let Some(u) = state.get_unit(unit) { |
| 2908 | match &mut u.stream { |
| 2909 | UnitStream::FileRead(r) => { |
| 2910 | let _ = r.seek(SeekFrom::Start(0)); |
| 2911 | } |
| 2912 | UnitStream::FileWrite(w) => { |
| 2913 | let _ = w.flush(); |
| 2914 | let _ = w.seek(SeekFrom::Start(0)); |
| 2915 | } |
| 2916 | UnitStream::FileRaw(f) => { |
| 2917 | let _ = f.seek(SeekFrom::Start(0)); |
| 2918 | } |
| 2919 | _ => {} |
| 2920 | } |
| 2921 | // Clear stale read tokens so subsequent reads come from file start. |
| 2922 | u.read_tokens.clear(); |
| 2923 | if !iostat.is_null() { |
| 2924 | unsafe { |
| 2925 | *iostat = 0; |
| 2926 | } |
| 2927 | } |
| 2928 | } |
| 2929 | } |
| 2930 | |
| 2931 | // ---- Program lifecycle integration ---- |
| 2932 | |
| 2933 | /// Initialize the I/O subsystem. Called from afs_program_init. |
| 2934 | #[no_mangle] |
| 2935 | pub extern "C" fn afs_io_init() { |
| 2936 | // Force initialization of the global state. |
| 2937 | drop(io_state().lock()); |
| 2938 | } |
| 2939 | |
| 2940 | /// Finalize the I/O subsystem. Flush and close all open units. |
| 2941 | #[no_mangle] |
| 2942 | pub extern "C" fn afs_io_finalize() { |
| 2943 | // Use try_lock instead of lock: process::exit invokes libc atexit handlers, |
| 2944 | // and any I/O routine that exited while holding io_state would deadlock here. |
| 2945 | // If the caller is already holding the lock during exit, their drop has already |
| 2946 | // unwound or process::exit released their mutex first; in the rare case where |
| 2947 | // the lock is genuinely contested, skip flush rather than hang the program. |
| 2948 | if let Ok(mut state) = io_state().try_lock() { |
| 2949 | for (_, unit) in state.units.iter_mut() { |
| 2950 | let _ = unit.flush(); |
| 2951 | } |
| 2952 | // Delete any STATUS='SCRATCH' backing files left open at exit. |
| 2953 | let scratch_paths: Vec<String> = state |
| 2954 | .units |
| 2955 | .values() |
| 2956 | .filter(|u| u.scratch && !u.filename.is_empty()) |
| 2957 | .map(|u| u.filename.clone()) |
| 2958 | .collect(); |
| 2959 | for path in scratch_paths { |
| 2960 | let _ = std::fs::remove_file(&path); |
| 2961 | } |
| 2962 | } |
| 2963 | } |
| 2964 | |
| 2965 | // ---- Formatted I/O (push-based API) ---- |
| 2966 | // |
| 2967 | // The format engine (format.rs) parses format strings and applies descriptors |
| 2968 | // to values. This API lets compiled code push values one at a time, then flush |
| 2969 | // the formatted output in one call. |
| 2970 | // |
| 2971 | // Usage from codegen: |
| 2972 | // afs_fmt_begin(unit, fmt_str, fmt_len) |
| 2973 | // afs_fmt_push_int(val) / afs_fmt_push_int128(&val) / afs_fmt_push_real(val) / ... |
| 2974 | // afs_fmt_end() |
| 2975 | |
| 2976 | use crate::format::{parse_format, FormatDesc, FormatEngine, IoValue}; |
| 2977 | use std::cell::RefCell; |
| 2978 | |
| 2979 | enum FmtSink { |
| 2980 | Unit(i32), |
| 2981 | Internal { buf: *mut u8, buf_len: usize }, |
| 2982 | } |
| 2983 | |
| 2984 | /// Thread-local state for the current formatted I/O operation. |
| 2985 | struct FmtContext { |
| 2986 | sink: FmtSink, |
| 2987 | format_str: String, |
| 2988 | values: Vec<IoValue>, |
| 2989 | iostat: *mut i32, |
| 2990 | iomsg: *mut u8, |
| 2991 | iomsg_len: i64, |
| 2992 | } |
| 2993 | |
| 2994 | // SAFETY: FmtContext only lives inside a thread-local; the raw |
| 2995 | // pointers are written by the same thread that begins the I/O. |
| 2996 | unsafe impl Send for FmtContext {} |
| 2997 | |
| 2998 | thread_local! { |
| 2999 | static FMT_CTX: RefCell<Option<FmtContext>> = const { RefCell::new(None) }; |
| 3000 | } |
| 3001 | |
| 3002 | /// Begin a formatted write operation. Parses the format string and prepares |
| 3003 | /// to accumulate values. |
| 3004 | #[no_mangle] |
| 3005 | pub extern "C" fn afs_fmt_begin(unit: i32, fmt_str: *const u8, fmt_len: i64) { |
| 3006 | afs_fmt_begin_ex( |
| 3007 | unit, |
| 3008 | fmt_str, |
| 3009 | fmt_len, |
| 3010 | std::ptr::null_mut(), |
| 3011 | std::ptr::null_mut(), |
| 3012 | 0, |
| 3013 | ); |
| 3014 | } |
| 3015 | |
| 3016 | /// Extended formatted-write begin: accepts iostat and iomsg pointers |
| 3017 | /// captured from the WRITE-statement specs. Either pointer may be null. |
| 3018 | #[no_mangle] |
| 3019 | pub extern "C" fn afs_fmt_begin_ex( |
| 3020 | unit: i32, |
| 3021 | fmt_str: *const u8, |
| 3022 | fmt_len: i64, |
| 3023 | iostat: *mut i32, |
| 3024 | iomsg: *mut u8, |
| 3025 | iomsg_len: i64, |
| 3026 | ) { |
| 3027 | let fmt = unsafe_str(fmt_str, fmt_len); |
| 3028 | FMT_CTX.with(|ctx| { |
| 3029 | *ctx.borrow_mut() = Some(FmtContext { |
| 3030 | sink: FmtSink::Unit(unit), |
| 3031 | format_str: fmt, |
| 3032 | values: Vec::new(), |
| 3033 | iostat, |
| 3034 | iomsg, |
| 3035 | iomsg_len, |
| 3036 | }); |
| 3037 | }); |
| 3038 | } |
| 3039 | |
| 3040 | /// Begin a formatted internal write operation targeting a character buffer. |
| 3041 | #[no_mangle] |
| 3042 | pub extern "C" fn afs_fmt_begin_internal( |
| 3043 | buf: *mut u8, |
| 3044 | buf_len: i64, |
| 3045 | fmt_str: *const u8, |
| 3046 | fmt_len: i64, |
| 3047 | ) { |
| 3048 | afs_fmt_begin_internal_ex( |
| 3049 | buf, |
| 3050 | buf_len, |
| 3051 | fmt_str, |
| 3052 | fmt_len, |
| 3053 | std::ptr::null_mut(), |
| 3054 | std::ptr::null_mut(), |
| 3055 | 0, |
| 3056 | ); |
| 3057 | } |
| 3058 | |
| 3059 | /// Extended internal-write begin with iostat/iomsg plumbing. |
| 3060 | #[no_mangle] |
| 3061 | pub extern "C" fn afs_fmt_begin_internal_ex( |
| 3062 | buf: *mut u8, |
| 3063 | buf_len: i64, |
| 3064 | fmt_str: *const u8, |
| 3065 | fmt_len: i64, |
| 3066 | iostat: *mut i32, |
| 3067 | iomsg: *mut u8, |
| 3068 | iomsg_len: i64, |
| 3069 | ) { |
| 3070 | let fmt = unsafe_str(fmt_str, fmt_len); |
| 3071 | FMT_CTX.with(|ctx| { |
| 3072 | *ctx.borrow_mut() = Some(FmtContext { |
| 3073 | sink: FmtSink::Internal { |
| 3074 | buf, |
| 3075 | buf_len: buf_len.max(0) as usize, |
| 3076 | }, |
| 3077 | format_str: fmt, |
| 3078 | values: Vec::new(), |
| 3079 | iostat, |
| 3080 | iomsg, |
| 3081 | iomsg_len, |
| 3082 | }); |
| 3083 | }); |
| 3084 | } |
| 3085 | |
| 3086 | /// Push an integer value for formatted output. |
| 3087 | #[no_mangle] |
| 3088 | pub extern "C" fn afs_fmt_push_int(val: i64) { |
| 3089 | FMT_CTX.with(|ctx| { |
| 3090 | if let Some(ref mut c) = *ctx.borrow_mut() { |
| 3091 | c.values.push(IoValue::Integer(val as i128)); |
| 3092 | } |
| 3093 | }); |
| 3094 | } |
| 3095 | |
| 3096 | /// Push an integer(16) value for formatted output. |
| 3097 | #[no_mangle] |
| 3098 | pub extern "C" fn afs_fmt_push_int128(val: *const i128) { |
| 3099 | FMT_CTX.with(|ctx| { |
| 3100 | if let Some(ref mut c) = *ctx.borrow_mut() { |
| 3101 | if let Some(wide) = read_i128_ptr(val) { |
| 3102 | c.values.push(IoValue::Integer(wide)); |
| 3103 | } |
| 3104 | } |
| 3105 | }); |
| 3106 | } |
| 3107 | |
| 3108 | /// Push a real (f64) value for formatted output. |
| 3109 | #[no_mangle] |
| 3110 | pub extern "C" fn afs_fmt_push_real(val: f64) { |
| 3111 | FMT_CTX.with(|ctx| { |
| 3112 | if let Some(ref mut c) = *ctx.borrow_mut() { |
| 3113 | c.values.push(IoValue::Real(val)); |
| 3114 | } |
| 3115 | }); |
| 3116 | } |
| 3117 | |
| 3118 | /// Push a logical value for formatted output. |
| 3119 | #[no_mangle] |
| 3120 | pub extern "C" fn afs_fmt_push_logical(val: i32) { |
| 3121 | FMT_CTX.with(|ctx| { |
| 3122 | if let Some(ref mut c) = *ctx.borrow_mut() { |
| 3123 | c.values.push(IoValue::Logical(val != 0)); |
| 3124 | } |
| 3125 | }); |
| 3126 | } |
| 3127 | |
| 3128 | /// Push a character string value for formatted output. |
| 3129 | #[no_mangle] |
| 3130 | pub extern "C" fn afs_fmt_push_string(ptr: *const u8, len: i64) { |
| 3131 | let bytes = if !ptr.is_null() && len > 0 { |
| 3132 | unsafe { std::slice::from_raw_parts(ptr, len as usize) }.to_vec() |
| 3133 | } else { |
| 3134 | Vec::new() |
| 3135 | }; |
| 3136 | FMT_CTX.with(|ctx| { |
| 3137 | if let Some(ref mut c) = *ctx.borrow_mut() { |
| 3138 | c.values.push(IoValue::Character(bytes)); |
| 3139 | } |
| 3140 | }); |
| 3141 | } |
| 3142 | |
| 3143 | /// End the formatted write: apply the format engine and write the result. |
| 3144 | /// If advance is true (nonzero), appends a newline. If false (zero), no newline. |
| 3145 | #[no_mangle] |
| 3146 | pub extern "C" fn afs_fmt_end(advance: i32) { |
| 3147 | FMT_CTX.with(|ctx| { |
| 3148 | let context = ctx.borrow_mut().take(); |
| 3149 | if let Some(c) = context { |
| 3150 | let descriptors = parse_format(&c.format_str); |
| 3151 | let mut engine = FormatEngine::new(descriptors); |
| 3152 | let output = engine.format_values(&c.values); |
| 3153 | |
| 3154 | // Track success across the sink branches. List-directed and |
| 3155 | // scalar formatted writes both leave `iostat` untouched on |
| 3156 | // older builds; stdlib's savetxt loops `if (ios/=0) error_stop` |
| 3157 | // on the post-write value, so a write that silently leaves the |
| 3158 | // pre-call sentinel in place trips the error-stop branch every |
| 3159 | // iteration. Set `*iostat = 0` on success and stash an empty |
| 3160 | // iomsg so callers see a clean state. |
| 3161 | let mut io_status: i32 = 0; |
| 3162 | let mut io_msg: Option<&'static str> = None; |
| 3163 | |
| 3164 | match c.sink { |
| 3165 | FmtSink::Unit(unit) => { |
| 3166 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 3167 | if let Some(u) = state.get_unit(unit) { |
| 3168 | if u.write_str(&output).is_err() { |
| 3169 | io_status = 1; |
| 3170 | io_msg = Some("write failed"); |
| 3171 | } |
| 3172 | if io_status == 0 && advance != 0 && u.write_str("\n").is_err() { |
| 3173 | io_status = 1; |
| 3174 | io_msg = Some("write failed"); |
| 3175 | } |
| 3176 | } else { |
| 3177 | io_status = 1; |
| 3178 | io_msg = Some("unit not connected"); |
| 3179 | } |
| 3180 | } |
| 3181 | FmtSink::Internal { buf, buf_len } => { |
| 3182 | write_to_buffer(buf, buf_len, 0, output.as_bytes(), std::ptr::null_mut()); |
| 3183 | } |
| 3184 | } |
| 3185 | |
| 3186 | if !c.iostat.is_null() { |
| 3187 | unsafe { *c.iostat = io_status }; |
| 3188 | } |
| 3189 | if !c.iomsg.is_null() && c.iomsg_len > 0 { |
| 3190 | let msg = io_msg.unwrap_or(""); |
| 3191 | let cap = c.iomsg_len as usize; |
| 3192 | let bytes = msg.as_bytes(); |
| 3193 | let copy = bytes.len().min(cap); |
| 3194 | unsafe { |
| 3195 | std::ptr::copy_nonoverlapping(bytes.as_ptr(), c.iomsg, copy); |
| 3196 | if copy < cap { |
| 3197 | // Pad remainder with spaces per Fortran character semantics. |
| 3198 | std::ptr::write_bytes(c.iomsg.add(copy), b' ', cap - copy); |
| 3199 | } |
| 3200 | } |
| 3201 | } |
| 3202 | } |
| 3203 | }); |
| 3204 | } |
| 3205 | |
| 3206 | fn advance_formatted_cursor(desc: &FormatDesc, input: &[u8], cursor: &mut usize) { |
| 3207 | match desc { |
| 3208 | FormatDesc::Skip { count } => { |
| 3209 | *cursor = (*cursor).saturating_add(*count).min(input.len()); |
| 3210 | } |
| 3211 | FormatDesc::TabTo { position } => { |
| 3212 | *cursor = position.saturating_sub(1).min(input.len()); |
| 3213 | } |
| 3214 | FormatDesc::TabLeft { count } => { |
| 3215 | *cursor = cursor.saturating_sub(*count); |
| 3216 | } |
| 3217 | FormatDesc::TabRight { count } => { |
| 3218 | *cursor = (*cursor).saturating_add(*count).min(input.len()); |
| 3219 | } |
| 3220 | FormatDesc::LiteralString(text) => { |
| 3221 | *cursor = (*cursor).saturating_add(text.len()).min(input.len()); |
| 3222 | } |
| 3223 | FormatDesc::Newline => { |
| 3224 | while *cursor < input.len() && input[*cursor] != b'\n' { |
| 3225 | *cursor += 1; |
| 3226 | } |
| 3227 | if *cursor < input.len() { |
| 3228 | *cursor += 1; |
| 3229 | } |
| 3230 | } |
| 3231 | _ => {} |
| 3232 | } |
| 3233 | } |
| 3234 | |
| 3235 | fn read_formatted_field(desc: &FormatDesc, input: &[u8], cursor: &mut usize) -> Option<String> { |
| 3236 | let take_width = |cursor: &mut usize, width: usize| { |
| 3237 | let start = (*cursor).min(input.len()); |
| 3238 | let end = start.saturating_add(width).min(input.len()); |
| 3239 | *cursor = end; |
| 3240 | String::from_utf8_lossy(&input[start..end]).into_owned() |
| 3241 | }; |
| 3242 | |
| 3243 | match desc { |
| 3244 | FormatDesc::IntegerI { width, .. } |
| 3245 | | FormatDesc::IntegerB { width, .. } |
| 3246 | | FormatDesc::IntegerO { width, .. } |
| 3247 | | FormatDesc::IntegerZ { width, .. } |
| 3248 | | FormatDesc::RealF { width, .. } |
| 3249 | | FormatDesc::RealE { width, .. } |
| 3250 | | FormatDesc::RealEN { width, .. } |
| 3251 | | FormatDesc::RealES { width, .. } |
| 3252 | | FormatDesc::RealEX { width, .. } |
| 3253 | | FormatDesc::RealD { width, .. } |
| 3254 | | FormatDesc::RealG { width, .. } |
| 3255 | | FormatDesc::Logical { width } => Some(take_width(cursor, *width)), |
| 3256 | FormatDesc::Character { width: Some(width) } => Some(take_width(cursor, *width)), |
| 3257 | FormatDesc::Character { width: None } => { |
| 3258 | let start = *cursor; |
| 3259 | *cursor = input.len(); |
| 3260 | Some(String::from_utf8_lossy(&input[start..]).into_owned()) |
| 3261 | } |
| 3262 | _ => None, |
| 3263 | } |
| 3264 | } |
| 3265 | |
| 3266 | fn extract_nth_formatted_field( |
| 3267 | descs: &[FormatDesc], |
| 3268 | input: &[u8], |
| 3269 | cursor: &mut usize, |
| 3270 | remaining_data_index: &mut usize, |
| 3271 | ) -> Option<(FormatDesc, String)> { |
| 3272 | for desc in descs { |
| 3273 | match desc { |
| 3274 | FormatDesc::Group { |
| 3275 | repeat, |
| 3276 | descriptors, |
| 3277 | } => { |
| 3278 | for _ in 0..*repeat { |
| 3279 | if let Some(found) = extract_nth_formatted_field( |
| 3280 | descriptors, |
| 3281 | input, |
| 3282 | cursor, |
| 3283 | remaining_data_index, |
| 3284 | ) { |
| 3285 | return Some(found); |
| 3286 | } |
| 3287 | } |
| 3288 | } |
| 3289 | FormatDesc::UnlimitedRepeat { descriptors } => { |
| 3290 | let mut loop_guard = 0usize; |
| 3291 | while *cursor < input.len() && loop_guard < input.len().saturating_add(1) { |
| 3292 | let before = *cursor; |
| 3293 | if let Some(found) = extract_nth_formatted_field( |
| 3294 | descriptors, |
| 3295 | input, |
| 3296 | cursor, |
| 3297 | remaining_data_index, |
| 3298 | ) { |
| 3299 | return Some(found); |
| 3300 | } |
| 3301 | if *cursor == before { |
| 3302 | break; |
| 3303 | } |
| 3304 | loop_guard += 1; |
| 3305 | } |
| 3306 | } |
| 3307 | _ => { |
| 3308 | if let Some(field) = read_formatted_field(desc, input, cursor) { |
| 3309 | if *remaining_data_index == 0 { |
| 3310 | return Some((desc.clone(), field)); |
| 3311 | } |
| 3312 | *remaining_data_index -= 1; |
| 3313 | } else { |
| 3314 | advance_formatted_cursor(desc, input, cursor); |
| 3315 | } |
| 3316 | } |
| 3317 | } |
| 3318 | } |
| 3319 | |
| 3320 | None |
| 3321 | } |
| 3322 | |
| 3323 | fn parse_nth_formatted_record( |
| 3324 | input: &[u8], |
| 3325 | fmt_str: *const u8, |
| 3326 | fmt_len: i64, |
| 3327 | data_index: i64, |
| 3328 | ) -> Result<(FormatDesc, String), i32> { |
| 3329 | let fmt = unsafe_str(fmt_str, fmt_len); |
| 3330 | let descs = parse_format(&fmt); |
| 3331 | let mut cursor = 0usize; |
| 3332 | let mut remaining = data_index.max(0) as usize; |
| 3333 | |
| 3334 | extract_nth_formatted_field(&descs, input, &mut cursor, &mut remaining).ok_or(-1) |
| 3335 | } |
| 3336 | |
| 3337 | fn parse_nth_formatted_internal_field( |
| 3338 | buf: *const u8, |
| 3339 | buf_len: i64, |
| 3340 | fmt_str: *const u8, |
| 3341 | fmt_len: i64, |
| 3342 | data_index: i64, |
| 3343 | ) -> Result<(FormatDesc, String), i32> { |
| 3344 | if buf.is_null() || buf_len <= 0 { |
| 3345 | return Err(-1); |
| 3346 | } |
| 3347 | |
| 3348 | let input = unsafe { std::slice::from_raw_parts(buf, buf_len as usize) }; |
| 3349 | parse_nth_formatted_record(input, fmt_str, fmt_len, data_index) |
| 3350 | } |
| 3351 | |
| 3352 | fn formatted_read_record_for_unit(unit: i32, data_index: i64) -> Result<String, i32> { |
| 3353 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 3354 | let Some(u) = state.get_unit(unit) else { |
| 3355 | return Err(1); |
| 3356 | }; |
| 3357 | |
| 3358 | if data_index <= 0 || u.formatted_read_record.is_none() { |
| 3359 | match u.read_line() { |
| 3360 | Ok(line) if !line.is_empty() => { |
| 3361 | u.formatted_read_record = Some(line); |
| 3362 | } |
| 3363 | Ok(_) => return Err(IOSTAT_END), |
| 3364 | Err(_) => return Err(1), |
| 3365 | } |
| 3366 | } |
| 3367 | |
| 3368 | u.formatted_read_record |
| 3369 | .as_ref() |
| 3370 | .map(|line| line.trim_end_matches(['\r', '\n']).to_string()) |
| 3371 | .ok_or(IOSTAT_END) |
| 3372 | } |
| 3373 | |
| 3374 | fn store_formatted_char_result( |
| 3375 | field: &str, |
| 3376 | dest: *mut u8, |
| 3377 | dest_len: i64, |
| 3378 | size_out: *mut i32, |
| 3379 | iostat: *mut i32, |
| 3380 | ) { |
| 3381 | crate::string::afs_assign_char_fixed(dest, dest_len, field.as_ptr(), field.len() as i64); |
| 3382 | if !size_out.is_null() { |
| 3383 | unsafe { |
| 3384 | *size_out = field.len().min(i32::MAX as usize) as i32; |
| 3385 | } |
| 3386 | } |
| 3387 | if !iostat.is_null() { |
| 3388 | unsafe { |
| 3389 | *iostat = 0; |
| 3390 | } |
| 3391 | } |
| 3392 | } |
| 3393 | |
| 3394 | fn store_formatted_char_error(dest: *mut u8, dest_len: i64, size_out: *mut i32, code: i32) { |
| 3395 | crate::string::afs_assign_char_fixed(dest, dest_len, std::ptr::null(), 0); |
| 3396 | if !size_out.is_null() { |
| 3397 | unsafe { |
| 3398 | *size_out = 0; |
| 3399 | } |
| 3400 | } |
| 3401 | if code != 0 { |
| 3402 | // Caller writes IOSTAT when it passed a non-null pointer. |
| 3403 | } |
| 3404 | } |
| 3405 | |
| 3406 | fn parse_formatted_integer_field(desc: &FormatDesc, field: &str) -> Option<i128> { |
| 3407 | let trimmed = field.trim().replace(',', ""); |
| 3408 | if trimmed.is_empty() { |
| 3409 | return None; |
| 3410 | } |
| 3411 | let (negative, digits) = if let Some(rest) = trimmed.strip_prefix('-') { |
| 3412 | (true, rest) |
| 3413 | } else if let Some(rest) = trimmed.strip_prefix('+') { |
| 3414 | (false, rest) |
| 3415 | } else { |
| 3416 | (false, trimmed.as_str()) |
| 3417 | }; |
| 3418 | let radix = match desc { |
| 3419 | FormatDesc::IntegerI { .. } => 10, |
| 3420 | FormatDesc::IntegerB { .. } => 2, |
| 3421 | FormatDesc::IntegerO { .. } => 8, |
| 3422 | FormatDesc::IntegerZ { .. } => 16, |
| 3423 | _ => return None, |
| 3424 | }; |
| 3425 | let parsed = i128::from_str_radix(digits, radix).ok()?; |
| 3426 | Some(if negative { -parsed } else { parsed }) |
| 3427 | } |
| 3428 | |
| 3429 | #[no_mangle] |
| 3430 | pub extern "C" fn afs_fmt_read_string( |
| 3431 | unit: i32, |
| 3432 | fmt_str: *const u8, |
| 3433 | fmt_len: i64, |
| 3434 | data_index: i64, |
| 3435 | dest: *mut u8, |
| 3436 | dest_len: i64, |
| 3437 | size_out: *mut i32, |
| 3438 | iostat: *mut i32, |
| 3439 | ) { |
| 3440 | // If a prior `read(...,advance='NO')` left a partial in-flight |
| 3441 | // record with cursor in the middle, consume from that cursor first |
| 3442 | // and then mark the record as fully consumed (advancing past it |
| 3443 | // for the next statement). Without this, switching from |
| 3444 | // non-advancing to advancing — exactly what stdlib's |
| 3445 | // `read_bitset_unit_64` does on its final-bit read — would call |
| 3446 | // `read_line` and discard the cursor, returning the wrong char or |
| 3447 | // EOF for files with a single physical record. |
| 3448 | { |
| 3449 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 3450 | if let Some(u) = state.get_unit(unit) { |
| 3451 | // Only treat the in-flight record as partial when the |
| 3452 | // cursor has actually advanced past 0 — i.e. a previous |
| 3453 | // `read(...,advance='NO')` consumed some chars. A cursor |
| 3454 | // of 0 means the record was set up by `read_line` for an |
| 3455 | // advancing read but never partially consumed; in that |
| 3456 | // case we must let the next advancing read pull a fresh |
| 3457 | // record (otherwise we'd re-deliver the same line). |
| 3458 | let has_partial_record = u.formatted_read_cursor > 0 |
| 3459 | && u.formatted_read_record.is_some() |
| 3460 | && u.formatted_read_cursor |
| 3461 | < u.formatted_read_record |
| 3462 | .as_ref() |
| 3463 | .map(|r| r.len()) |
| 3464 | .unwrap_or(0); |
| 3465 | if has_partial_record { |
| 3466 | let fmt = unsafe_str(fmt_str, fmt_len); |
| 3467 | let descs = parse_format(&fmt); |
| 3468 | let input = u |
| 3469 | .formatted_read_record |
| 3470 | .as_ref() |
| 3471 | .map(|l| l.as_bytes().to_vec()) |
| 3472 | .unwrap_or_default(); |
| 3473 | let mut cursor = u.formatted_read_cursor; |
| 3474 | let mut remaining = 0usize; |
| 3475 | let outcome = |
| 3476 | extract_nth_formatted_field(&descs, &input, &mut cursor, &mut remaining); |
| 3477 | u.formatted_read_record = None; |
| 3478 | u.formatted_read_cursor = 0; |
| 3479 | drop(state); |
| 3480 | match outcome { |
| 3481 | Some((FormatDesc::Character { .. }, field)) => { |
| 3482 | store_formatted_char_result(&field, dest, dest_len, size_out, iostat); |
| 3483 | } |
| 3484 | _ => { |
| 3485 | store_formatted_char_error(dest, dest_len, size_out, IOSTAT_EOR); |
| 3486 | if !iostat.is_null() { |
| 3487 | unsafe { |
| 3488 | *iostat = IOSTAT_EOR; |
| 3489 | } |
| 3490 | } |
| 3491 | } |
| 3492 | } |
| 3493 | return; |
| 3494 | } |
| 3495 | } |
| 3496 | } |
| 3497 | match formatted_read_record_for_unit(unit, data_index) |
| 3498 | .and_then(|line| parse_nth_formatted_record(line.as_bytes(), fmt_str, fmt_len, data_index)) |
| 3499 | { |
| 3500 | Ok((FormatDesc::Character { .. }, field)) => { |
| 3501 | store_formatted_char_result(&field, dest, dest_len, size_out, iostat); |
| 3502 | } |
| 3503 | Ok(_) => { |
| 3504 | store_formatted_char_error(dest, dest_len, size_out, 1); |
| 3505 | if !iostat.is_null() { |
| 3506 | unsafe { |
| 3507 | *iostat = 1; |
| 3508 | } |
| 3509 | } |
| 3510 | } |
| 3511 | Err(code) => { |
| 3512 | store_formatted_char_error(dest, dest_len, size_out, code); |
| 3513 | if !iostat.is_null() { |
| 3514 | unsafe { |
| 3515 | *iostat = code; |
| 3516 | } |
| 3517 | } |
| 3518 | } |
| 3519 | } |
| 3520 | } |
| 3521 | |
| 3522 | #[no_mangle] |
| 3523 | pub extern "C" fn afs_fmt_read_string_noadvance( |
| 3524 | unit: i32, |
| 3525 | fmt_str: *const u8, |
| 3526 | fmt_len: i64, |
| 3527 | dest: *mut u8, |
| 3528 | dest_len: i64, |
| 3529 | size_out: *mut i32, |
| 3530 | iostat: *mut i32, |
| 3531 | ) { |
| 3532 | let fmt = unsafe_str(fmt_str, fmt_len); |
| 3533 | let descs = parse_format(&fmt); |
| 3534 | |
| 3535 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 3536 | let Some(u) = state.get_unit(unit) else { |
| 3537 | store_formatted_char_error(dest, dest_len, size_out, 1); |
| 3538 | if !iostat.is_null() { |
| 3539 | unsafe { |
| 3540 | *iostat = 1; |
| 3541 | } |
| 3542 | } |
| 3543 | return; |
| 3544 | }; |
| 3545 | |
| 3546 | if u.formatted_read_record.is_none() { |
| 3547 | match u.read_line() { |
| 3548 | Ok(line) if !line.is_empty() => { |
| 3549 | u.formatted_read_record = Some(line.trim_end_matches(['\r', '\n']).to_string()); |
| 3550 | u.formatted_read_cursor = 0; |
| 3551 | } |
| 3552 | Ok(_) => { |
| 3553 | store_formatted_char_error(dest, dest_len, size_out, IOSTAT_END); |
| 3554 | if !iostat.is_null() { |
| 3555 | unsafe { |
| 3556 | *iostat = IOSTAT_END; |
| 3557 | } |
| 3558 | } |
| 3559 | return; |
| 3560 | } |
| 3561 | Err(_) => { |
| 3562 | store_formatted_char_error(dest, dest_len, size_out, 1); |
| 3563 | if !iostat.is_null() { |
| 3564 | unsafe { |
| 3565 | *iostat = 1; |
| 3566 | } |
| 3567 | } |
| 3568 | return; |
| 3569 | } |
| 3570 | } |
| 3571 | } |
| 3572 | |
| 3573 | let input = u |
| 3574 | .formatted_read_record |
| 3575 | .as_ref() |
| 3576 | .map(|line| line.as_bytes().to_vec()) |
| 3577 | .unwrap_or_default(); |
| 3578 | if u.formatted_read_cursor >= input.len() { |
| 3579 | store_formatted_char_error(dest, dest_len, size_out, IOSTAT_EOR); |
| 3580 | if !iostat.is_null() { |
| 3581 | unsafe { |
| 3582 | *iostat = IOSTAT_EOR; |
| 3583 | } |
| 3584 | } |
| 3585 | u.formatted_read_record = None; |
| 3586 | u.formatted_read_cursor = 0; |
| 3587 | return; |
| 3588 | } |
| 3589 | let mut cursor = u.formatted_read_cursor; |
| 3590 | let mut remaining = 0usize; |
| 3591 | |
| 3592 | match extract_nth_formatted_field(&descs, &input, &mut cursor, &mut remaining) { |
| 3593 | Some((FormatDesc::Character { .. }, field)) => { |
| 3594 | store_formatted_char_result(&field, dest, dest_len, size_out, iostat); |
| 3595 | u.formatted_read_cursor = cursor; |
| 3596 | } |
| 3597 | Some(_) => { |
| 3598 | store_formatted_char_error(dest, dest_len, size_out, 1); |
| 3599 | if !iostat.is_null() { |
| 3600 | unsafe { |
| 3601 | *iostat = 1; |
| 3602 | } |
| 3603 | } |
| 3604 | } |
| 3605 | None => { |
| 3606 | store_formatted_char_error(dest, dest_len, size_out, IOSTAT_EOR); |
| 3607 | if !iostat.is_null() { |
| 3608 | unsafe { |
| 3609 | *iostat = IOSTAT_EOR; |
| 3610 | } |
| 3611 | } |
| 3612 | u.formatted_read_record = None; |
| 3613 | u.formatted_read_cursor = 0; |
| 3614 | } |
| 3615 | } |
| 3616 | } |
| 3617 | |
| 3618 | #[no_mangle] |
| 3619 | pub extern "C" fn afs_fmt_read_int( |
| 3620 | unit: i32, |
| 3621 | fmt_str: *const u8, |
| 3622 | fmt_len: i64, |
| 3623 | data_index: i64, |
| 3624 | val: *mut i32, |
| 3625 | iostat: *mut i32, |
| 3626 | ) { |
| 3627 | match formatted_read_record_for_unit(unit, data_index) |
| 3628 | .and_then(|line| parse_nth_formatted_record(line.as_bytes(), fmt_str, fmt_len, data_index)) |
| 3629 | { |
| 3630 | Ok((desc @ FormatDesc::IntegerI { .. }, field)) |
| 3631 | | Ok((desc @ FormatDesc::IntegerB { .. }, field)) |
| 3632 | | Ok((desc @ FormatDesc::IntegerO { .. }, field)) |
| 3633 | | Ok((desc @ FormatDesc::IntegerZ { .. }, field)) => { |
| 3634 | match parse_formatted_integer_field(&desc, &field).and_then(|v| i32::try_from(v).ok()) { |
| 3635 | Some(v) => { |
| 3636 | if !val.is_null() { |
| 3637 | unsafe { |
| 3638 | *val = v; |
| 3639 | } |
| 3640 | } |
| 3641 | if !iostat.is_null() { |
| 3642 | unsafe { |
| 3643 | *iostat = 0; |
| 3644 | } |
| 3645 | } |
| 3646 | } |
| 3647 | None => { |
| 3648 | if !iostat.is_null() { |
| 3649 | unsafe { |
| 3650 | *iostat = 1; |
| 3651 | } |
| 3652 | } |
| 3653 | } |
| 3654 | } |
| 3655 | } |
| 3656 | Ok(_) => { |
| 3657 | if !iostat.is_null() { |
| 3658 | unsafe { |
| 3659 | *iostat = 1; |
| 3660 | } |
| 3661 | } |
| 3662 | } |
| 3663 | Err(code) => { |
| 3664 | if !iostat.is_null() { |
| 3665 | unsafe { |
| 3666 | *iostat = code; |
| 3667 | } |
| 3668 | } |
| 3669 | } |
| 3670 | } |
| 3671 | } |
| 3672 | |
| 3673 | #[no_mangle] |
| 3674 | pub extern "C" fn afs_fmt_read_int64( |
| 3675 | unit: i32, |
| 3676 | fmt_str: *const u8, |
| 3677 | fmt_len: i64, |
| 3678 | data_index: i64, |
| 3679 | val: *mut i64, |
| 3680 | iostat: *mut i32, |
| 3681 | ) { |
| 3682 | match formatted_read_record_for_unit(unit, data_index) |
| 3683 | .and_then(|line| parse_nth_formatted_record(line.as_bytes(), fmt_str, fmt_len, data_index)) |
| 3684 | { |
| 3685 | Ok((desc @ FormatDesc::IntegerI { .. }, field)) |
| 3686 | | Ok((desc @ FormatDesc::IntegerB { .. }, field)) |
| 3687 | | Ok((desc @ FormatDesc::IntegerO { .. }, field)) |
| 3688 | | Ok((desc @ FormatDesc::IntegerZ { .. }, field)) => { |
| 3689 | match parse_formatted_integer_field(&desc, &field).and_then(|v| i64::try_from(v).ok()) { |
| 3690 | Some(v) => { |
| 3691 | if !val.is_null() { |
| 3692 | unsafe { |
| 3693 | *val = v; |
| 3694 | } |
| 3695 | } |
| 3696 | if !iostat.is_null() { |
| 3697 | unsafe { |
| 3698 | *iostat = 0; |
| 3699 | } |
| 3700 | } |
| 3701 | } |
| 3702 | None => { |
| 3703 | if !iostat.is_null() { |
| 3704 | unsafe { |
| 3705 | *iostat = 1; |
| 3706 | } |
| 3707 | } |
| 3708 | } |
| 3709 | } |
| 3710 | } |
| 3711 | Ok(_) => { |
| 3712 | if !iostat.is_null() { |
| 3713 | unsafe { |
| 3714 | *iostat = 1; |
| 3715 | } |
| 3716 | } |
| 3717 | } |
| 3718 | Err(code) => { |
| 3719 | if !iostat.is_null() { |
| 3720 | unsafe { |
| 3721 | *iostat = code; |
| 3722 | } |
| 3723 | } |
| 3724 | } |
| 3725 | } |
| 3726 | } |
| 3727 | |
| 3728 | #[no_mangle] |
| 3729 | pub extern "C" fn afs_fmt_read_int128( |
| 3730 | unit: i32, |
| 3731 | fmt_str: *const u8, |
| 3732 | fmt_len: i64, |
| 3733 | data_index: i64, |
| 3734 | val: *mut i128, |
| 3735 | iostat: *mut i32, |
| 3736 | ) { |
| 3737 | match formatted_read_record_for_unit(unit, data_index) |
| 3738 | .and_then(|line| parse_nth_formatted_record(line.as_bytes(), fmt_str, fmt_len, data_index)) |
| 3739 | { |
| 3740 | Ok((desc @ FormatDesc::IntegerI { .. }, field)) |
| 3741 | | Ok((desc @ FormatDesc::IntegerB { .. }, field)) |
| 3742 | | Ok((desc @ FormatDesc::IntegerO { .. }, field)) |
| 3743 | | Ok((desc @ FormatDesc::IntegerZ { .. }, field)) => { |
| 3744 | match parse_formatted_integer_field(&desc, &field) { |
| 3745 | Some(v) => { |
| 3746 | write_i128_ptr(val, v); |
| 3747 | if !iostat.is_null() { |
| 3748 | unsafe { |
| 3749 | *iostat = 0; |
| 3750 | } |
| 3751 | } |
| 3752 | } |
| 3753 | None => { |
| 3754 | if !iostat.is_null() { |
| 3755 | unsafe { |
| 3756 | *iostat = 1; |
| 3757 | } |
| 3758 | } |
| 3759 | } |
| 3760 | } |
| 3761 | } |
| 3762 | Ok(_) => { |
| 3763 | if !iostat.is_null() { |
| 3764 | unsafe { |
| 3765 | *iostat = 1; |
| 3766 | } |
| 3767 | } |
| 3768 | } |
| 3769 | Err(code) => { |
| 3770 | if !iostat.is_null() { |
| 3771 | unsafe { |
| 3772 | *iostat = code; |
| 3773 | } |
| 3774 | } |
| 3775 | } |
| 3776 | } |
| 3777 | } |
| 3778 | |
| 3779 | #[no_mangle] |
| 3780 | pub extern "C" fn afs_fmt_read_real( |
| 3781 | unit: i32, |
| 3782 | fmt_str: *const u8, |
| 3783 | fmt_len: i64, |
| 3784 | data_index: i64, |
| 3785 | val: *mut f64, |
| 3786 | iostat: *mut i32, |
| 3787 | ) { |
| 3788 | match formatted_read_record_for_unit(unit, data_index) |
| 3789 | .and_then(|line| parse_nth_formatted_record(line.as_bytes(), fmt_str, fmt_len, data_index)) |
| 3790 | { |
| 3791 | Ok((FormatDesc::RealF { .. }, field)) |
| 3792 | | Ok((FormatDesc::RealE { .. }, field)) |
| 3793 | | Ok((FormatDesc::RealEN { .. }, field)) |
| 3794 | | Ok((FormatDesc::RealES { .. }, field)) |
| 3795 | | Ok((FormatDesc::RealEX { .. }, field)) |
| 3796 | | Ok((FormatDesc::RealD { .. }, field)) |
| 3797 | | Ok((FormatDesc::RealG { .. }, field)) => { |
| 3798 | let normalized = field |
| 3799 | .trim() |
| 3800 | .replace('d', "e") |
| 3801 | .replace('D', "E") |
| 3802 | .replace(',', ""); |
| 3803 | match normalized.parse::<f64>() { |
| 3804 | Ok(v) => { |
| 3805 | if !val.is_null() { |
| 3806 | unsafe { |
| 3807 | *val = v; |
| 3808 | } |
| 3809 | } |
| 3810 | if !iostat.is_null() { |
| 3811 | unsafe { |
| 3812 | *iostat = 0; |
| 3813 | } |
| 3814 | } |
| 3815 | } |
| 3816 | Err(_) => { |
| 3817 | if !iostat.is_null() { |
| 3818 | unsafe { |
| 3819 | *iostat = 1; |
| 3820 | } |
| 3821 | } |
| 3822 | } |
| 3823 | } |
| 3824 | } |
| 3825 | Ok(_) => { |
| 3826 | if !iostat.is_null() { |
| 3827 | unsafe { |
| 3828 | *iostat = 1; |
| 3829 | } |
| 3830 | } |
| 3831 | } |
| 3832 | Err(code) => { |
| 3833 | if !iostat.is_null() { |
| 3834 | unsafe { |
| 3835 | *iostat = code; |
| 3836 | } |
| 3837 | } |
| 3838 | } |
| 3839 | } |
| 3840 | } |
| 3841 | |
| 3842 | #[no_mangle] |
| 3843 | pub extern "C" fn afs_fmt_read_string_internal( |
| 3844 | buf: *const u8, |
| 3845 | buf_len: i64, |
| 3846 | fmt_str: *const u8, |
| 3847 | fmt_len: i64, |
| 3848 | data_index: i64, |
| 3849 | dest: *mut u8, |
| 3850 | dest_len: i64, |
| 3851 | size_out: *mut i32, |
| 3852 | iostat: *mut i32, |
| 3853 | ) { |
| 3854 | match parse_nth_formatted_internal_field(buf, buf_len, fmt_str, fmt_len, data_index) { |
| 3855 | Ok((FormatDesc::Character { .. }, field)) => { |
| 3856 | store_formatted_char_result(&field, dest, dest_len, size_out, iostat); |
| 3857 | } |
| 3858 | Ok(_) => { |
| 3859 | store_formatted_char_error(dest, dest_len, size_out, 1); |
| 3860 | if !iostat.is_null() { |
| 3861 | unsafe { |
| 3862 | *iostat = 1; |
| 3863 | } |
| 3864 | } |
| 3865 | } |
| 3866 | Err(code) => { |
| 3867 | store_formatted_char_error(dest, dest_len, size_out, code); |
| 3868 | if !iostat.is_null() { |
| 3869 | unsafe { |
| 3870 | *iostat = code; |
| 3871 | } |
| 3872 | } |
| 3873 | } |
| 3874 | } |
| 3875 | } |
| 3876 | |
| 3877 | #[no_mangle] |
| 3878 | pub extern "C" fn afs_fmt_read_int_internal( |
| 3879 | buf: *const u8, |
| 3880 | buf_len: i64, |
| 3881 | fmt_str: *const u8, |
| 3882 | fmt_len: i64, |
| 3883 | data_index: i64, |
| 3884 | val: *mut i32, |
| 3885 | iostat: *mut i32, |
| 3886 | ) { |
| 3887 | match parse_nth_formatted_internal_field(buf, buf_len, fmt_str, fmt_len, data_index) { |
| 3888 | Ok((desc @ FormatDesc::IntegerI { .. }, field)) |
| 3889 | | Ok((desc @ FormatDesc::IntegerB { .. }, field)) |
| 3890 | | Ok((desc @ FormatDesc::IntegerO { .. }, field)) |
| 3891 | | Ok((desc @ FormatDesc::IntegerZ { .. }, field)) => { |
| 3892 | match parse_formatted_integer_field(&desc, &field).and_then(|v| i32::try_from(v).ok()) { |
| 3893 | Some(v) => { |
| 3894 | if !val.is_null() { |
| 3895 | unsafe { |
| 3896 | *val = v; |
| 3897 | } |
| 3898 | } |
| 3899 | if !iostat.is_null() { |
| 3900 | unsafe { |
| 3901 | *iostat = 0; |
| 3902 | } |
| 3903 | } |
| 3904 | } |
| 3905 | None => { |
| 3906 | if !iostat.is_null() { |
| 3907 | unsafe { |
| 3908 | *iostat = 1; |
| 3909 | } |
| 3910 | } |
| 3911 | } |
| 3912 | } |
| 3913 | } |
| 3914 | Ok(_) => { |
| 3915 | if !iostat.is_null() { |
| 3916 | unsafe { |
| 3917 | *iostat = 1; |
| 3918 | } |
| 3919 | } |
| 3920 | } |
| 3921 | Err(code) => { |
| 3922 | if !iostat.is_null() { |
| 3923 | unsafe { |
| 3924 | *iostat = code; |
| 3925 | } |
| 3926 | } |
| 3927 | } |
| 3928 | } |
| 3929 | } |
| 3930 | |
| 3931 | #[no_mangle] |
| 3932 | pub extern "C" fn afs_fmt_read_int64_internal( |
| 3933 | buf: *const u8, |
| 3934 | buf_len: i64, |
| 3935 | fmt_str: *const u8, |
| 3936 | fmt_len: i64, |
| 3937 | data_index: i64, |
| 3938 | val: *mut i64, |
| 3939 | iostat: *mut i32, |
| 3940 | ) { |
| 3941 | match parse_nth_formatted_internal_field(buf, buf_len, fmt_str, fmt_len, data_index) { |
| 3942 | Ok((desc @ FormatDesc::IntegerI { .. }, field)) |
| 3943 | | Ok((desc @ FormatDesc::IntegerB { .. }, field)) |
| 3944 | | Ok((desc @ FormatDesc::IntegerO { .. }, field)) |
| 3945 | | Ok((desc @ FormatDesc::IntegerZ { .. }, field)) => { |
| 3946 | match parse_formatted_integer_field(&desc, &field).and_then(|v| i64::try_from(v).ok()) { |
| 3947 | Some(v) => { |
| 3948 | if !val.is_null() { |
| 3949 | unsafe { |
| 3950 | *val = v; |
| 3951 | } |
| 3952 | } |
| 3953 | if !iostat.is_null() { |
| 3954 | unsafe { |
| 3955 | *iostat = 0; |
| 3956 | } |
| 3957 | } |
| 3958 | } |
| 3959 | None => { |
| 3960 | if !iostat.is_null() { |
| 3961 | unsafe { |
| 3962 | *iostat = 1; |
| 3963 | } |
| 3964 | } |
| 3965 | } |
| 3966 | } |
| 3967 | } |
| 3968 | Ok(_) => { |
| 3969 | if !iostat.is_null() { |
| 3970 | unsafe { |
| 3971 | *iostat = 1; |
| 3972 | } |
| 3973 | } |
| 3974 | } |
| 3975 | Err(code) => { |
| 3976 | if !iostat.is_null() { |
| 3977 | unsafe { |
| 3978 | *iostat = code; |
| 3979 | } |
| 3980 | } |
| 3981 | } |
| 3982 | } |
| 3983 | } |
| 3984 | |
| 3985 | #[no_mangle] |
| 3986 | pub extern "C" fn afs_fmt_read_int128_internal( |
| 3987 | buf: *const u8, |
| 3988 | buf_len: i64, |
| 3989 | fmt_str: *const u8, |
| 3990 | fmt_len: i64, |
| 3991 | data_index: i64, |
| 3992 | val: *mut i128, |
| 3993 | iostat: *mut i32, |
| 3994 | ) { |
| 3995 | match parse_nth_formatted_internal_field(buf, buf_len, fmt_str, fmt_len, data_index) { |
| 3996 | Ok((desc @ FormatDesc::IntegerI { .. }, field)) |
| 3997 | | Ok((desc @ FormatDesc::IntegerB { .. }, field)) |
| 3998 | | Ok((desc @ FormatDesc::IntegerO { .. }, field)) |
| 3999 | | Ok((desc @ FormatDesc::IntegerZ { .. }, field)) => { |
| 4000 | match parse_formatted_integer_field(&desc, &field) { |
| 4001 | Some(v) => { |
| 4002 | write_i128_ptr(val, v); |
| 4003 | if !iostat.is_null() { |
| 4004 | unsafe { |
| 4005 | *iostat = 0; |
| 4006 | } |
| 4007 | } |
| 4008 | } |
| 4009 | None => { |
| 4010 | if !iostat.is_null() { |
| 4011 | unsafe { |
| 4012 | *iostat = 1; |
| 4013 | } |
| 4014 | } |
| 4015 | } |
| 4016 | } |
| 4017 | } |
| 4018 | Ok(_) => { |
| 4019 | if !iostat.is_null() { |
| 4020 | unsafe { |
| 4021 | *iostat = 1; |
| 4022 | } |
| 4023 | } |
| 4024 | } |
| 4025 | Err(code) => { |
| 4026 | if !iostat.is_null() { |
| 4027 | unsafe { |
| 4028 | *iostat = code; |
| 4029 | } |
| 4030 | } |
| 4031 | } |
| 4032 | } |
| 4033 | } |
| 4034 | |
| 4035 | #[no_mangle] |
| 4036 | pub extern "C" fn afs_fmt_read_real_internal( |
| 4037 | buf: *const u8, |
| 4038 | buf_len: i64, |
| 4039 | fmt_str: *const u8, |
| 4040 | fmt_len: i64, |
| 4041 | data_index: i64, |
| 4042 | val: *mut f64, |
| 4043 | iostat: *mut i32, |
| 4044 | ) { |
| 4045 | match parse_nth_formatted_internal_field(buf, buf_len, fmt_str, fmt_len, data_index) { |
| 4046 | Ok((FormatDesc::RealF { .. }, field)) |
| 4047 | | Ok((FormatDesc::RealE { .. }, field)) |
| 4048 | | Ok((FormatDesc::RealEN { .. }, field)) |
| 4049 | | Ok((FormatDesc::RealES { .. }, field)) |
| 4050 | | Ok((FormatDesc::RealEX { .. }, field)) |
| 4051 | | Ok((FormatDesc::RealD { .. }, field)) |
| 4052 | | Ok((FormatDesc::RealG { .. }, field)) => { |
| 4053 | let normalized = field |
| 4054 | .trim() |
| 4055 | .replace('d', "e") |
| 4056 | .replace('D', "E") |
| 4057 | .replace(',', ""); |
| 4058 | match normalized.parse::<f64>() { |
| 4059 | Ok(v) => { |
| 4060 | if !val.is_null() { |
| 4061 | unsafe { |
| 4062 | *val = v; |
| 4063 | } |
| 4064 | } |
| 4065 | if !iostat.is_null() { |
| 4066 | unsafe { |
| 4067 | *iostat = 0; |
| 4068 | } |
| 4069 | } |
| 4070 | } |
| 4071 | Err(_) => { |
| 4072 | if !iostat.is_null() { |
| 4073 | unsafe { |
| 4074 | *iostat = 1; |
| 4075 | } |
| 4076 | } |
| 4077 | } |
| 4078 | } |
| 4079 | } |
| 4080 | Ok(_) => { |
| 4081 | if !iostat.is_null() { |
| 4082 | unsafe { |
| 4083 | *iostat = 1; |
| 4084 | } |
| 4085 | } |
| 4086 | } |
| 4087 | Err(code) => { |
| 4088 | if !iostat.is_null() { |
| 4089 | unsafe { |
| 4090 | *iostat = code; |
| 4091 | } |
| 4092 | } |
| 4093 | } |
| 4094 | } |
| 4095 | } |
| 4096 | |
| 4097 | #[cfg(test)] |
| 4098 | mod tests { |
| 4099 | use super::*; |
| 4100 | |
| 4101 | #[test] |
| 4102 | fn preconnected_units() { |
| 4103 | let state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 4104 | assert!(state.units.contains_key(&0)); // stderr |
| 4105 | assert!(state.units.contains_key(&5)); // stdin |
| 4106 | assert!(state.units.contains_key(&6)); // stdout |
| 4107 | } |
| 4108 | |
| 4109 | #[test] |
| 4110 | fn newunit_allocation() { |
| 4111 | let mut state = io_state().lock().unwrap_or_else(|e| e.into_inner()); |
| 4112 | let u1 = state.alloc_newunit(); |
| 4113 | let u2 = state.alloc_newunit(); |
| 4114 | assert!(u1 < 0); // negative unit numbers |
| 4115 | assert_ne!(u1, u2); |
| 4116 | } |
| 4117 | |
| 4118 | #[test] |
| 4119 | fn write_to_stdout() { |
| 4120 | // This test just verifies no panic — output goes to test runner's stdout. |
| 4121 | afs_write_int(6, 42); |
| 4122 | afs_write_newline(6); |
| 4123 | } |
| 4124 | |
| 4125 | #[test] |
| 4126 | fn stream_unformatted_string_write_preserves_exact_bytes() { |
| 4127 | let path = "/tmp/afs_stream_unformatted_string_write.dat"; |
| 4128 | let mut iostat = -99i32; |
| 4129 | let cb = OpenControlBlock { |
| 4130 | unit: 94, |
| 4131 | filename: path.as_ptr(), |
| 4132 | filename_len: path.len() as i64, |
| 4133 | status: "replace".as_ptr(), |
| 4134 | status_len: 7, |
| 4135 | action: "write".as_ptr(), |
| 4136 | action_len: 5, |
| 4137 | access: "stream".as_ptr(), |
| 4138 | access_len: 6, |
| 4139 | form: "unformatted".as_ptr(), |
| 4140 | form_len: 11, |
| 4141 | recl: 0, |
| 4142 | iostat: &mut iostat, |
| 4143 | newunit: std::ptr::null_mut(), |
| 4144 | position: std::ptr::null(), |
| 4145 | position_len: 0, |
| 4146 | }; |
| 4147 | |
| 4148 | afs_open(&cb); |
| 4149 | assert_eq!(iostat, 0, "expected stream-unformatted OPEN to succeed"); |
| 4150 | |
| 4151 | afs_write_string(94, "alpha".as_ptr(), 5); |
| 4152 | afs_write_newline(94); |
| 4153 | afs_close(94, std::ptr::null_mut()); |
| 4154 | |
| 4155 | let content = std::fs::read(path).unwrap(); |
| 4156 | assert_eq!(content, b"alpha", "expected exact stream bytes"); |
| 4157 | } |
| 4158 | |
| 4159 | #[test] |
| 4160 | fn write_i128_to_file() { |
| 4161 | let path = "/tmp/afs_write_i128_test.dat"; |
| 4162 | afs_open_simple( |
| 4163 | 97, |
| 4164 | path.as_ptr(), |
| 4165 | path.len() as i64, |
| 4166 | "replace".as_ptr(), |
| 4167 | 7, |
| 4168 | std::ptr::null(), |
| 4169 | 0, |
| 4170 | ); |
| 4171 | |
| 4172 | afs_write_int128(97, 170141183460469231731687303715884105727i128); |
| 4173 | afs_write_newline(97); |
| 4174 | afs_close(97, std::ptr::null_mut()); |
| 4175 | |
| 4176 | let content = std::fs::read_to_string(path).unwrap(); |
| 4177 | assert!( |
| 4178 | content.contains("170141183460469231731687303715884105727"), |
| 4179 | "expected full i128 decimal rendering in: {}", |
| 4180 | content |
| 4181 | ); |
| 4182 | } |
| 4183 | |
| 4184 | #[test] |
| 4185 | fn read_i128_from_file() { |
| 4186 | let path = "/tmp/afs_read_i128_test.dat"; |
| 4187 | std::fs::write(path, "170141183460469231731687303715884105727\n").unwrap(); |
| 4188 | |
| 4189 | afs_open_simple( |
| 4190 | 95, |
| 4191 | path.as_ptr(), |
| 4192 | path.len() as i64, |
| 4193 | "old".as_ptr(), |
| 4194 | 3, |
| 4195 | "read".as_ptr(), |
| 4196 | 4, |
| 4197 | ); |
| 4198 | |
| 4199 | let mut value = 0i128; |
| 4200 | let mut iostat = -99i32; |
| 4201 | afs_read_int128(95, &mut value, &mut iostat); |
| 4202 | afs_close(95, std::ptr::null_mut()); |
| 4203 | |
| 4204 | assert_eq!(iostat, 0, "expected successful i128 read"); |
| 4205 | assert_eq!(value, 170141183460469231731687303715884105727i128); |
| 4206 | } |
| 4207 | |
| 4208 | #[test] |
| 4209 | fn internal_i128_roundtrip_tracks_position() { |
| 4210 | let mut buf = [b' '; 96]; |
| 4211 | let mut write_pos = 0i64; |
| 4212 | |
| 4213 | afs_write_internal_int128( |
| 4214 | buf.as_mut_ptr(), |
| 4215 | buf.len() as i64, |
| 4216 | 170141183460469231731687303715884105727i128, |
| 4217 | &mut write_pos, |
| 4218 | ); |
| 4219 | afs_write_internal_int128( |
| 4220 | buf.as_mut_ptr(), |
| 4221 | buf.len() as i64, |
| 4222 | -170141183460469231731687303715884105727i128, |
| 4223 | &mut write_pos, |
| 4224 | ); |
| 4225 | |
| 4226 | let mut read_pos = 0i64; |
| 4227 | let mut first = 0i128; |
| 4228 | let mut second = 0i128; |
| 4229 | let mut iostat = -99i32; |
| 4230 | |
| 4231 | afs_read_internal_int128( |
| 4232 | buf.as_ptr(), |
| 4233 | buf.len() as i64, |
| 4234 | &mut read_pos, |
| 4235 | &mut first, |
| 4236 | &mut iostat, |
| 4237 | ); |
| 4238 | assert_eq!(iostat, 0, "expected first internal i128 read to succeed"); |
| 4239 | |
| 4240 | afs_read_internal_int128( |
| 4241 | buf.as_ptr(), |
| 4242 | buf.len() as i64, |
| 4243 | &mut read_pos, |
| 4244 | &mut second, |
| 4245 | &mut iostat, |
| 4246 | ); |
| 4247 | assert_eq!(iostat, 0, "expected second internal i128 read to succeed"); |
| 4248 | assert_eq!(first, 170141183460469231731687303715884105727i128); |
| 4249 | assert_eq!(second, -170141183460469231731687303715884105727i128); |
| 4250 | } |
| 4251 | |
| 4252 | #[test] |
| 4253 | fn internal_i128_read_accepts_unaligned_destination() { |
| 4254 | let buf = b"170141183460469231731687303715884105727"; |
| 4255 | let mut pos = 0i64; |
| 4256 | let mut raw = [0u8; 32]; |
| 4257 | let ptr = unsafe { raw.as_mut_ptr().add(1) as *mut i128 }; |
| 4258 | let mut iostat = -99i32; |
| 4259 | |
| 4260 | afs_read_internal_int128(buf.as_ptr(), buf.len() as i64, &mut pos, ptr, &mut iostat); |
| 4261 | |
| 4262 | assert_eq!(iostat, 0, "expected internal i128 read to succeed"); |
| 4263 | let value = unsafe { std::ptr::read_unaligned(ptr) }; |
| 4264 | assert_eq!(value, 170141183460469231731687303715884105727i128); |
| 4265 | } |
| 4266 | |
| 4267 | #[test] |
| 4268 | fn formatted_write_to_file() { |
| 4269 | let path = "/tmp/afs_fmt_test.dat"; |
| 4270 | afs_open_simple( |
| 4271 | 99, |
| 4272 | path.as_ptr(), |
| 4273 | path.len() as i64, |
| 4274 | "replace".as_ptr(), |
| 4275 | 7, |
| 4276 | std::ptr::null(), |
| 4277 | 0, |
| 4278 | ); |
| 4279 | |
| 4280 | afs_fmt_begin(99, "(I5, F8.2)".as_ptr(), 10); |
| 4281 | afs_fmt_push_int(42); |
| 4282 | afs_fmt_push_real(3.14); |
| 4283 | afs_fmt_end(1); // with newline |
| 4284 | |
| 4285 | afs_close(99, std::ptr::null_mut()); |
| 4286 | |
| 4287 | let content = std::fs::read_to_string(path).unwrap(); |
| 4288 | assert!(content.contains("42"), "expected 42 in: {}", content); |
| 4289 | assert!(content.contains("3.14"), "expected 3.14 in: {}", content); |
| 4290 | } |
| 4291 | |
| 4292 | #[test] |
| 4293 | fn formatted_write_integer16_to_file() { |
| 4294 | let path = "/tmp/afs_fmt_i128_test.dat"; |
| 4295 | let wide = 170141183460469231731687303715884105727i128; |
| 4296 | afs_open_simple( |
| 4297 | 96, |
| 4298 | path.as_ptr(), |
| 4299 | path.len() as i64, |
| 4300 | "replace".as_ptr(), |
| 4301 | 7, |
| 4302 | std::ptr::null(), |
| 4303 | 0, |
| 4304 | ); |
| 4305 | |
| 4306 | afs_fmt_begin(96, "(I40)".as_ptr(), 5); |
| 4307 | afs_fmt_push_int128(&wide); |
| 4308 | afs_fmt_end(1); |
| 4309 | |
| 4310 | afs_close(96, std::ptr::null_mut()); |
| 4311 | |
| 4312 | let content = std::fs::read_to_string(path).unwrap(); |
| 4313 | assert!( |
| 4314 | content.contains("170141183460469231731687303715884105727"), |
| 4315 | "expected full formatted i128 rendering in: {}", |
| 4316 | content |
| 4317 | ); |
| 4318 | } |
| 4319 | |
| 4320 | #[test] |
| 4321 | fn formatted_write_integer16_accepts_unaligned_pointer() { |
| 4322 | let mut rendered = [b' '; 64]; |
| 4323 | let mut raw = [0u8; 32]; |
| 4324 | let wide = 170141183460469231731687303715884105727i128; |
| 4325 | let ptr = unsafe { raw.as_mut_ptr().add(1) as *mut i128 }; |
| 4326 | |
| 4327 | unsafe { std::ptr::write_unaligned(ptr, wide) }; |
| 4328 | |
| 4329 | afs_fmt_begin_internal( |
| 4330 | rendered.as_mut_ptr(), |
| 4331 | rendered.len() as i64, |
| 4332 | "(I40)".as_ptr(), |
| 4333 | 5, |
| 4334 | ); |
| 4335 | afs_fmt_push_int128(ptr); |
| 4336 | afs_fmt_end(0); |
| 4337 | |
| 4338 | let text = String::from_utf8_lossy(&rendered).into_owned(); |
| 4339 | assert!( |
| 4340 | text.contains("170141183460469231731687303715884105727"), |
| 4341 | "expected formatted internal write to accept unaligned i128 pointer: {:?}", |
| 4342 | text |
| 4343 | ); |
| 4344 | } |
| 4345 | |
| 4346 | #[test] |
| 4347 | fn formatted_internal_write_pads_buffer() { |
| 4348 | let mut buf = [b'?'; 48]; |
| 4349 | |
| 4350 | afs_fmt_begin_internal(buf.as_mut_ptr(), buf.len() as i64, "(I6)".as_ptr(), 4); |
| 4351 | afs_fmt_push_int(42); |
| 4352 | afs_fmt_end(0); |
| 4353 | |
| 4354 | let rendered = String::from_utf8_lossy(&buf).into_owned(); |
| 4355 | assert!( |
| 4356 | rendered.starts_with(" 42"), |
| 4357 | "expected formatted internal output at start of buffer: {:?}", |
| 4358 | rendered |
| 4359 | ); |
| 4360 | assert!( |
| 4361 | rendered[6..].bytes().all(|b| b == b' '), |
| 4362 | "expected remaining internal buffer to be space padded: {:?}", |
| 4363 | rendered |
| 4364 | ); |
| 4365 | } |
| 4366 | |
| 4367 | #[test] |
| 4368 | fn formatted_internal_read_i128_field() { |
| 4369 | let buf = b" 170141183460469231731687303715884105727"; |
| 4370 | let mut value = 0i128; |
| 4371 | let mut iostat = -99i32; |
| 4372 | |
| 4373 | afs_fmt_read_int128_internal( |
| 4374 | buf.as_ptr(), |
| 4375 | buf.len() as i64, |
| 4376 | "(I40)".as_ptr(), |
| 4377 | 5, |
| 4378 | 0, |
| 4379 | &mut value, |
| 4380 | &mut iostat, |
| 4381 | ); |
| 4382 | |
| 4383 | assert_eq!( |
| 4384 | iostat, 0, |
| 4385 | "expected formatted internal i128 read to succeed" |
| 4386 | ); |
| 4387 | assert_eq!(value, 170141183460469231731687303715884105727i128); |
| 4388 | } |
| 4389 | |
| 4390 | #[test] |
| 4391 | fn formatted_internal_read_i128_accepts_unaligned_destination() { |
| 4392 | let buf = b" 170141183460469231731687303715884105727"; |
| 4393 | let mut raw = [0u8; 32]; |
| 4394 | let ptr = unsafe { raw.as_mut_ptr().add(1) as *mut i128 }; |
| 4395 | let mut iostat = -99i32; |
| 4396 | |
| 4397 | afs_fmt_read_int128_internal( |
| 4398 | buf.as_ptr(), |
| 4399 | buf.len() as i64, |
| 4400 | "(I40)".as_ptr(), |
| 4401 | 5, |
| 4402 | 0, |
| 4403 | ptr, |
| 4404 | &mut iostat, |
| 4405 | ); |
| 4406 | |
| 4407 | assert_eq!( |
| 4408 | iostat, 0, |
| 4409 | "expected formatted internal i128 read to succeed" |
| 4410 | ); |
| 4411 | let value = unsafe { std::ptr::read_unaligned(ptr) }; |
| 4412 | assert_eq!(value, 170141183460469231731687303715884105727i128); |
| 4413 | } |
| 4414 | |
| 4415 | #[test] |
| 4416 | fn formatted_internal_read_tracks_descriptor_index() { |
| 4417 | let buf = b" 42 7"; |
| 4418 | let mut first = 0i32; |
| 4419 | let mut second = 0i32; |
| 4420 | let mut iostat = -99i32; |
| 4421 | |
| 4422 | afs_fmt_read_int_internal( |
| 4423 | buf.as_ptr(), |
| 4424 | buf.len() as i64, |
| 4425 | "(I4,1X,I1)".as_ptr(), |
| 4426 | 10, |
| 4427 | 0, |
| 4428 | &mut first, |
| 4429 | &mut iostat, |
| 4430 | ); |
| 4431 | assert_eq!(iostat, 0); |
| 4432 | |
| 4433 | afs_fmt_read_int_internal( |
| 4434 | buf.as_ptr(), |
| 4435 | buf.len() as i64, |
| 4436 | "(I4,1X,I1)".as_ptr(), |
| 4437 | 10, |
| 4438 | 1, |
| 4439 | &mut second, |
| 4440 | &mut iostat, |
| 4441 | ); |
| 4442 | assert_eq!(iostat, 0); |
| 4443 | assert_eq!(first, 42); |
| 4444 | assert_eq!(second, 7); |
| 4445 | } |
| 4446 | |
| 4447 | #[test] |
| 4448 | fn formatted_internal_read_supports_octal_descriptor() { |
| 4449 | let buf = b"077 22"; |
| 4450 | let mut first = 0i32; |
| 4451 | let mut second = 0i32; |
| 4452 | let mut iostat = -99i32; |
| 4453 | |
| 4454 | afs_fmt_read_int_internal( |
| 4455 | buf.as_ptr(), |
| 4456 | buf.len() as i64, |
| 4457 | "(O3,1X,O2)".as_ptr(), |
| 4458 | 10, |
| 4459 | 0, |
| 4460 | &mut first, |
| 4461 | &mut iostat, |
| 4462 | ); |
| 4463 | assert_eq!(iostat, 0); |
| 4464 | |
| 4465 | afs_fmt_read_int_internal( |
| 4466 | buf.as_ptr(), |
| 4467 | buf.len() as i64, |
| 4468 | "(O3,1X,O2)".as_ptr(), |
| 4469 | 10, |
| 4470 | 1, |
| 4471 | &mut second, |
| 4472 | &mut iostat, |
| 4473 | ); |
| 4474 | assert_eq!(iostat, 0); |
| 4475 | assert_eq!(first, 63); |
| 4476 | assert_eq!(second, 18); |
| 4477 | } |
| 4478 | |
| 4479 | #[test] |
| 4480 | fn formatted_unit_read_i128_field() { |
| 4481 | let path = "/tmp/afs_fmt_read_i128_test.dat"; |
| 4482 | std::fs::write(path, " 170141183460469231731687303715884105727\n").unwrap(); |
| 4483 | |
| 4484 | afs_open_simple( |
| 4485 | 94, |
| 4486 | path.as_ptr(), |
| 4487 | path.len() as i64, |
| 4488 | "old".as_ptr(), |
| 4489 | 3, |
| 4490 | "read".as_ptr(), |
| 4491 | 4, |
| 4492 | ); |
| 4493 | |
| 4494 | let mut value = 0i128; |
| 4495 | let mut iostat = -99i32; |
| 4496 | afs_fmt_read_int128(94, "(I40)".as_ptr(), 5, 0, &mut value, &mut iostat); |
| 4497 | afs_close(94, std::ptr::null_mut()); |
| 4498 | |
| 4499 | assert_eq!(iostat, 0, "expected formatted unit i128 read to succeed"); |
| 4500 | assert_eq!(value, 170141183460469231731687303715884105727i128); |
| 4501 | } |
| 4502 | |
| 4503 | #[test] |
| 4504 | fn formatted_unit_read_tracks_descriptor_index() { |
| 4505 | let path = "/tmp/afs_fmt_read_multi_test.dat"; |
| 4506 | std::fs::write(path, " 170141183460469231731687303715884105727 42\n").unwrap(); |
| 4507 | |
| 4508 | afs_open_simple( |
| 4509 | 93, |
| 4510 | path.as_ptr(), |
| 4511 | path.len() as i64, |
| 4512 | "old".as_ptr(), |
| 4513 | 3, |
| 4514 | "read".as_ptr(), |
| 4515 | 4, |
| 4516 | ); |
| 4517 | |
| 4518 | let mut first = 0i128; |
| 4519 | let mut second = 0i32; |
| 4520 | let mut iostat = -99i32; |
| 4521 | afs_fmt_read_int128(93, "(I40,1X,I4)".as_ptr(), 10, 0, &mut first, &mut iostat); |
| 4522 | assert_eq!(iostat, 0); |
| 4523 | |
| 4524 | afs_fmt_read_int(93, "(I40,1X,I4)".as_ptr(), 10, 1, &mut second, &mut iostat); |
| 4525 | afs_close(93, std::ptr::null_mut()); |
| 4526 | |
| 4527 | assert_eq!(iostat, 0); |
| 4528 | assert_eq!(first, 170141183460469231731687303715884105727i128); |
| 4529 | assert_eq!(second, 42); |
| 4530 | } |
| 4531 | |
| 4532 | #[test] |
| 4533 | fn formatted_readwrite_unit_advances_across_records() { |
| 4534 | let path = "/tmp/afs_fmt_read_records_rw_test.dat"; |
| 4535 | std::fs::write( |
| 4536 | path, |
| 4537 | " 170141183460469231731687303715884105727\n-170141183460469231731687303715884105727\n", |
| 4538 | ) |
| 4539 | .unwrap(); |
| 4540 | |
| 4541 | afs_open_simple( |
| 4542 | 92, |
| 4543 | path.as_ptr(), |
| 4544 | path.len() as i64, |
| 4545 | "old".as_ptr(), |
| 4546 | 3, |
| 4547 | "readwrite".as_ptr(), |
| 4548 | 9, |
| 4549 | ); |
| 4550 | |
| 4551 | let mut first = 0i128; |
| 4552 | let mut second = 0i128; |
| 4553 | let mut iostat = -99i32; |
| 4554 | |
| 4555 | afs_fmt_read_int128(92, "(I40)".as_ptr(), 5, 0, &mut first, &mut iostat); |
| 4556 | assert_eq!( |
| 4557 | iostat, 0, |
| 4558 | "expected first formatted readwrite-unit read to succeed" |
| 4559 | ); |
| 4560 | |
| 4561 | afs_fmt_read_int128(92, "(I40)".as_ptr(), 5, 0, &mut second, &mut iostat); |
| 4562 | afs_close(92, std::ptr::null_mut()); |
| 4563 | |
| 4564 | assert_eq!( |
| 4565 | iostat, 0, |
| 4566 | "expected second formatted readwrite-unit read to succeed" |
| 4567 | ); |
| 4568 | assert_eq!(first, 170141183460469231731687303715884105727i128); |
| 4569 | assert_eq!(second, -170141183460469231731687303715884105727i128); |
| 4570 | } |
| 4571 | |
| 4572 | #[test] |
| 4573 | fn formatted_write_no_advance() { |
| 4574 | let path = "/tmp/afs_fmt_noadv_test.dat"; |
| 4575 | afs_open_simple( |
| 4576 | 98, |
| 4577 | path.as_ptr(), |
| 4578 | path.len() as i64, |
| 4579 | "replace".as_ptr(), |
| 4580 | 7, |
| 4581 | std::ptr::null(), |
| 4582 | 0, |
| 4583 | ); |
| 4584 | |
| 4585 | afs_fmt_begin(98, "('hello')".as_ptr(), 9); |
| 4586 | afs_fmt_end(0); // no newline |
| 4587 | |
| 4588 | afs_fmt_begin(98, "(' world')".as_ptr(), 10); |
| 4589 | afs_fmt_end(1); // with newline |
| 4590 | |
| 4591 | afs_close(98, std::ptr::null_mut()); |
| 4592 | |
| 4593 | let content = std::fs::read_to_string(path).unwrap(); |
| 4594 | assert_eq!(content.trim(), "hello world"); |
| 4595 | } |
| 4596 | } |
| 4597 |